Arnold, Lacey. (2015). Multiple mergers: Production and perception of three pre-/l/ mergers in Youngstown, Ohio. University of Pennsylvania Working Papers in Linguistics
21:1–10. Available at: http://repository.upenn.edu/pwpl/vol21/iss2/2. Accessed September 13, 2016.
Ash, Sharon. (2006). The North American Midland as a dialect area. In Murray, T. E. & Simon, B. L. (eds.), Language variation and change in the American Midland. Amsterdam: John Benjamins. 33–56.
Bailey, Guy, Wilke, Tom, & Sand, Lori. (1991). The focus of linguistic innovation in Texas. English World-Wide
Bates, Douglas, Maechler, Martin, Bolker, Ben, & Walker, Steve. (2015). Fitting linear mixed-effects models using lme4. Journal of Statistical Software
Bhattacharyya, Anil Kumar. (1943). On a measure of divergence between two statistical populations defined by their probability distributions. Bulletin of the Calcutta Mathematical Society
Boersma, Paul, & Weenink, David. (2013). Praat: Doing phonetics by computer [Computer program]. Version 5.3.84. Available at: http://www.praat.org/. Accessed September 4, 2014.
Bowie, David. (2000). The effect of geographic mobility on the retention of local dialect. PhD dissertation, University of Pennsylvania.
Calenge, Clement. (2006). The package adehabitat for the R software: A tool for the analysis of space and habitat use by animals. Ecological Modelling
De Decker, Paul, & Nycz, Jennifer. (2013). The technology of conducting sociolinguistic interviews. In Mallinson, C., Childs, B., & Van Herk, G. (eds.), Data collection in sociolinguistics: Methods and applications. New York: Routledge. 119–126.
Di Paolo, Marianna. (1992). Hypercorrection in response to the apparent merger of (ɔ) and (ɑ) in Utah English. Language and Communication
Di Paolo, Marianna, & Faber, Alice. (1990). Phonation differences in Utah English. Language Variation and Change
Dickey, Laura Walsh. (1997). The phonology of liquids. PhD dissertation, University of Massachusetts at Amherst.
Eckert, Penelope. (1989). Jocks and Burnouts: Social categories and identity in the high school. New York: Teachers College Press.
Eckert, Penelope (2000). Linguistic variation as social practice: The linguistic construction of identity in Belten High. Oxford: Blackwell.
Evanini, Keelan. (2009). The permeability of dialect boundaries: A case study of the region surrounding Erie, Pennsylvania. PhD dissertation, University of Pennsylvania.
Faber, Alice, & Di Paolo, Marianna. (1995). The discriminability of nearly merged sounds. Haskins Laboratories Status Report on Speech Research
Faries, Rachel B., & Lance, Donald M. (1991). Regional variation in Missouri. In Frazer, T. C. (ed.), “Heartland” English: Variation and transition in the American Midwest. Tuscaloosa: University of Alabama Press. 245–256.
Fruehwald, Joseph. (2013). The phonological influence on phonetic change. PhD dissertation, University of Pennsylvania.
Gordon, Matthew J. (2006). Tracking the low back merger in Missouri. In Murray, T. E. & Simon, B. L. (eds.), Language variation and change in the American Midland. Amsterdam: John Benjamins. 57–68.
Guenter, Joshua. (2000). Vowels of California English before /r/, /l/, and /ŋ/. PhD dissertation, University of California at Berkeley.
Habick, Timothy. (1980). Sound change in Farmer City: A sociolinguistic study based on acoustic data. PhD dissertation, University of Illinois at Urbana-Champaign.
Hay, Jennifer, Warren, Paul, & Drager, Katie. (2006). Factors influencing speech perception in the context of a merger-in-progress. Journal of Phonetics
Herold, Ruth. (1990). Mechanisms of merger: The implementation and distribution of the low back merger in eastern Pennsylvania. PhD dissertation, University of Pennsylvania.
Herold, Ruth. (1997). Solving the actuation problem: Merger and immigration in eastern Pennsylvania. Language Variation and Change
Herzog, Marvin I. (1965). The Yiddish language in Northern Poland: Its geography and history. Bloomington: Mouton.
Johnson, Bruce Lee. (1971). The Western Pennsylvania Dialect of American English. Journal of the International Phonetic Association
Johnson, Daniel Ezra. (2009). Getting off the GoldVarb standard: Introducing Rbrul for mixed-effects variable rule analysis. Language and Linguistics Compass
Johnson, Daniel Ezra. (2010). Stability and change along a dialect boundary: The low vowels of southeastern New England. Publication of the American Dialect Society 95. Durham: Duke University Press.
Johnstone, Barbara, Bhasin, Neeta, & Wittkofski, Denise. (2002). “Dahntahn” Pittsburgh: Monophthongal /aw/ and representations of localness in southwestern Pennsylvania. American Speech
Labov, William. (1994). Principles of linguistic change. Vol. 1: Internal factors. Oxford: Blackwell.
Labov, William. (2001). Principles of linguistic change. Vol. 2: Social factors. Oxford: Blackwell.
Labov, William. (2010). Principles of linguistic change. Vol. 3: Cognitive and cultural factors. Oxford: Blackwell.
Labov, William, Ash, Sharon, & Boberg, Charles. (2006). Atlas of North American English: Phonetics, phonology, and sound change. Berlin: Mouton de Gruyter.
Labov, William, Rosenfelder, Ingrid, & Fruehwald, Josef. (2013). One hundred years of sound change in Philadelphia: Linear incrementation, reversal, and reanalysis. Language
Labov, William, Yaeger, Malcah, & Steiner, Richard. (1972). A quantitative study of sound change in progress. Philadelphia: US Regional Survey.
Lobanov, B. M. (1971). Classification of Russian vowels spoken by different speakers. Journal of the Acoustical Society of America
Lusk, Melanie M. (1976). Phonological variation in Kansas City: A sociolinguistic analysis of three-generation families. PhD dissertation, University of Kansas.
McElhinny, Bonnie. (1999). More on the Third Dialect of English: Linguistic constraints on the use of three phonological variables in Pittsburgh. Language Variation and Change
Nunberg, Geoffrey. (1980). A falsely reported merger in eighteenth century English: A study in diachronic variation. In Labov, W. (ed.), Locating language in time and space. New York: Academic Press. 221–250.
R Core Team. (2016). R: A language and environment for statistical computing. Vienna: R Foundation for Statistical Computing. Available at: https://www.R-project.org/. Accessed May 3, 2016.
Rosenfelder, Ingrid, Fruehwald, Joseph, Evanini, Keelan, & Yuan, Jiahong. (2011). FAVE (Forced Alignment and Vowel Extraction) Program Suite. Available at: http://fave.ling.upenn.edu. Accessed September 13, 2016.
Shores, David L. (1985). Vowels before /l/ and /r/ in the Tangier dialect. Journal of English Linguistics
Strelluf, Christopher. (2014). “We have such a normal, non-accented voice”: A sociophonetic study of English in Kansas City. PhD dissertation, University of Missouri.
Thomas, Erik R. (1989/1993). Vowel changes in Columbus, Ohio. Journal of English Linguistics
Thomas, Erik R. (1996). A comparison of variation patterns of variables among sixth-graders in an Ohio community. In Schneider, E. W. (ed.), Focus on the USA. Varieties of English around the World 16. Amsterdam: John Benjamins. 149–168.
Thomas, Erik R. (2001). An acoustic analysis of vowel variation in New World English. Publication of the American Dialect Society 85. Durham: Duke University Press.
Thomas, Erik R. (2011). Sociophonetics: An introduction. New York: Palgrave Macmillan.
Wells, J. C. (1982). The Accents of English. Vol. 1: An introduction. Cambridge: Cambridge University Press.
Wolfram, Walt, & Schilling-Estes, Natalie. (2016). American English. 3rd ed.