1. Arnold, P.T. Dix, and Becker, R.B. 1936. Influence of Preceding Dry Period and of Mineral Supplement on Lactation. Jour. Dairy Sci., 19, No. 4: 257-266.
2. The Effect of Age and Dry Period on Production at Different Levels of Producing Ability;Dickerson;Ann. Proc. Amer. Soc. Anim. Prod.,1939
3. Tester's Computer Compilation;Kendrick,1939