(1)Buchanan, Smith A. D.et al. The inheritance of milk yield in Ayrshire cows. (Reprint.) J. Dairy Res. (1930), 1, No. 2.
(2)Buchanan, Smith A. D. and Robinson, O. J.Average age of cows and bulls in six breeds of cattle. J. Agric. Sci. (1931), 21, 136.
(3)Buchanan, Smith A. D. and Robinson, O. J. The inheritance of milk yield. Proc. Internat. Dairy Cong. (1931).
(4)Castle, W. E.Inheritance of quantity and quality of milk production in dairy cattle. Proc. Nat. Acad. Sci. (1919), 5, 428.
(5)Cole, W. E.Systems of Dairy Farming (1931), publ. by the College of Estate Management. (Private circulation.)
(6)Davidson, F. A.Measuring the breeding value of dairy sires by the records of their first few advanced registry daughters. Ill. Agr. Exper. Stat. Bull. (1925), 270, 545.
(7)Eckles, C. H.Influence of fatness of cow at parturition on percentage of fat in the milk. Missouri Agr. Exper. Stat. Bull. (1912), 100.
(8)Eckles, C. H.Age of calving as a factor influencing the dairy qualities of cows. Missouri Agr. Exper. Stat. Bull. (1915), 135.
(9)Eckles, C. H.Dairy Cattle and Milk Production (1929). The Macmillan Co., New York.
(10)Gaines, W. L. The inheritance of fat content in dairy cattle. Proc. Amer. Soc. Animal Prod. 1922 (1922), p. 29.
(11)Gaines, W. L. and Davidson, F. A.Relation between percentage fat content and yield of milk. Ill. Agr. Exper. Stat. Bull. (1923), 245.
(12)Gifford, W. Data necessary to prove pure bred dairy sires. Guernsey Breeders’ J. (1930). Sept. 1.
(13)Gifford, W. and Elting, E. C.The effect of the ages of sire and dam on the average butterfat production of the offspring in dairy cattle. Dairy Sci. (1928), 11.
(14)Goodale, H. D.A sire's breeding index with special reference to milk production. Amer. Nat. (1927), No. 671, p. 539.
(15)Gowen, J. W.Studies in milk secretion: on the variations and correlations of milk secretion with age. Genetics (1920), 5, 111.
(16)Gowen, J. W.Inheritance in crosses of dairy and beef breeds of cattle, II. On the transmission of milk yield to the first generation. J. Heredity (1920), 11, 300.
(17)Gowen, J. W.Inheritance in crosses of dairy and beef breeds of cattle, III. On the transmission of butterfat percentage to the first generation. J. Heredity (1920), 11, 365.
(18)Gowen, J. W.Inheritance of milk production. Maine Agr. Exper. Stat. Bull. (1924), 321, 172.
(19)Gowen, J. W.Milk Secretion (1924). Williams and Wilkins Co. Baltimore.
(20)Graves, R. R.Transmitting ability of twenty-three Holstein-Friesian Sires. U.S. Dept. Agr. Bull. (1926), 1372.
(21)Graves, R. R.Effect of age and development on butterfat production of register of merit Jersey and advanced register Guernsey cattle. U.S. Dept. Agr. Bull. (1925), 1352.
(22)Graves, R. R.A herediscope demonstration of dairy cattle improvement. J. Genetics (1929), 20, 431.
(23)Hammond, J.Reproduction in the Cow (1927). Camb. Univ. Press.
(24)Kay, R. R. and M'Candlish, A. C.Factors affecting the yield and quality of milk; the age of the cow. J. Agric. Sci. (1929), 19, 342.
(25)M'Candlish, A. C.Length of life of the dairy cow. Scot. J. Agric. (1930), 13, 284.
(26)M'Candlish, A. C. Influence of age at time of first calving on milk and butterfat production. Proc. World's Dairy Congress (1928), p. 288.
(27)M'Candlish, A. C. and Kay, R. R.The need for the selection of dairy bulls. Scot. J. Agric. (1930), 13, 381.
(28)Patow, C. F. Von. Further studies on the inheritance of milk yield in cattle. (Trans, title.) Z. Tierzuchtung u. Züchtungsbiol. (1930), 173. Translation by Imp. Bur. Animal Genetics, Edinburgh.
(29)Pearl, R.Report of progress on animal husbandry investigations in 1916. Maine Stat. Bull. (1917), 161, 121.
(30)Pearl, R., Gowen, J. W. and Miner, J. R.Studies in milk secretion. Transmitting qualities of Jersey sires for milk yield, butterfat percentage and butterfat. Maine Agr. Exper. Stat. Bull. (1919), 281, 89, 165.
(31)Prentice, E. P. A quarter of a century of progress in breeding dairy cattle. Part 1. Reprint. Guernsey Breeders’ J. (1928).
(32)Ragsdale, A. C. and Gifford, W.Selecting the dairy sire. Missouri Agr. Exper. Stat. Bull. (1929), 275.
(33)Roberts, E.Correlation between percentage fat in cows’ milk and the yield. J. Agric. Res. (1918), 14, 67.
(34)Sanders, H. G.The variation in milk yield caused by the season of the year, service, age and dry period, and their elimination. J. Agric. Sci. (1927), 17, 339, 502; 18, 46, 209.
(35)Sanders, H. G. Wastage in dairy cattle. Report Agric. Organisers’ Conference, Cambridge (1931).
(36)Turner, C. W.Factors affecting the percentage of fat in cows’ milk. Missouri Agr. Exper. Stat. Bull. (1924), 222.
(37)Turner, C. W.The mode of inheritance of yearly butterfat production. Missouri Agr. Exper. Stat. Res. (1927), 112.
(38)Wilson, J.The separate inheritance of quantity and quality in cows’ milk. Sci. Proc. Roy. Dubl. Soc. (1910), 12, 470.
(39)Wilson, J.A theory of the mode of inheritance of milk yield in cattle. J. Dept. Lands and Agr. Ireland (1925), 25, No. 1.
(40)Wodsedalek, J. C.Studies on the cells of cattle with special reference to spermatogenesis, oogenesis and sex determination. Biol. Bull. (1920), 38.
(41)Woodward, T. E. The production of dairy cows as affected by frequency and regularity of milking and feeding. U.S. Dept. Agric. (1931), circ. 180.
(42)Wriedt, Chr. The inheritance of butterfat percentage in crosses of Jerseys with Red Danes. J. Genetics (1930), 22, 45.
(43)Wright, S. Method of evaluating potentialities of sires (1926). Letter of Oct. 1, 1926, to Dr C. H. Eckles.
(44)Yapp, W. W.Simple method of testing sires adopted. Ill. Agr. Exper. Stat. Rpt. (1924), 114.
(45) Conference on inheritance and breeding of cattle (1925): Minutes of meeting held by Nat. Res. Council at Washington, D.C.