Brown, R. (1973). A first language: the early stages. Cambridge, MA: Harvard University Press.
Crystal, D. (1979). Working with LARSP. New York: Elsevier.
Crystal, D., Fletcher, P. & Garman, M. (1976). The grammatical analysis of language disability: a procedure for assessment and remediation. New York: Elsevier.
Cunningham, C., Reuler, J., Blackwell, M. & Deck, J. (1981). Behavioral and linguistic developments in the interactions of normal and retarded children with their mothers. Child Development 52. 62–70.
Darley, F. & Moll, K. (1960). Reliability of language measures and size of language sample. Journal of Speech and Hearing Research 3. 166–73.
de Villiers, J. & de Villiers, P. (1973). A cross-sectional study of the acquisition of grammatical morphemes in child speech. Journal of Psycholinguistic Research 2. 267–78.
Erreich, A. (1980). Why you won't play with me? Paper presented to the Fifth Annual Boston University Conference on Language Development.
Hollingshead, A. (1957). Two-factor index of social position. Unpublished manuscript, Yale University.
Klee, T. & Fitzgerald, M. (1985). The relation between grammatical development and mean length of utterance in morphemes. Journal of Child Language 12. 251–69.
Kramer, C., James, S. & Saxman, J. (1979). A comparison of language samples elicited at home and in the clinic. Journal of Speech and Hearing Disorders 44. 321–30.
Lord, F. & Novick, M. (1968). Statistical theories of mental test scores. New York: Pergamon.
Miller, J. & Chapman, R. (1981). The relation between age and mean length of utterance in morphemes. Journal of Speech and Hearing Research 24. 154–61.
Minifie, F., Darley, F. & Sherman, D. (1963). Temporal reliability of seven language measures. Journal of Speech and Hearing Research 6. 139–49.
Morehead, D. & Ingram, D. (1973). The development of base syntax in normal and linguistically deviant children. Journal of Speech and Hearing Research 16. 330–52.
Rondal, J. A. (1978). Maternal speech to normal and Down's syndrome children matched for mean length of utterance. In Meyers, C. (ed.), Quality of life in severely and profoundly mentally retarded people: research foundations for improvement. Washington, DC: American Association on Mental Deficiency.
Rondal, J. A. (1980). Fathers' and mothers' speech in early language development. Journal of Child Language 7. 353–69.
Rondal, J. A. (1985). Linguistic and prelinguistic development in moderate and severe mental retardation. In Dobbing, J. (ed.), Scientific studies in mental retardation. London: the Royal Society of Medicine and the Macmillan Press.
Rondal, J. A., Bachelet, J. F. & Pérée, F. (1985). Analyse du langage et des interactions verbales adulte-enfant. Bulletin d'Audiophonologie 5/6. 507–36.
Rondal, J. A. & Defays, D. (1978). Reliability of mean length of utterance as a function of sample size in early language development. Journal of General Psychology 133. 305–06.
Siegel, G. (1963). Adult verbal behavior in ‘play therapy’ sessions with retarded children. Journal of Speech and Hearing Disorders 10. 34–8.
Templin, M. (1957). Certain language skills in children. Minneapolis: University of Minnesota Press.