1. Variations in composition of milk in certain midland districts of England during the years 1923-1931;Baker;The Jour. of Dairy Res,1933
2. Jahreszeitliche Schwankungen des prozentischen Fettgethaltes in Kühmilch;Eckles;Milchw. Zentbl., Heft,1909
3. Dairy cattle and milk production;Eckles,1923
4. The influence of the stage of lactation on the composition and properties of milk;Eckles;U. S. Dept. Agr. Bur. An. Indus. Bul.,1913
5. Methods of correlation analysis;Ezekial,1930