共 13 条
[1]
BENDER CB, 1928, NJ AGR EXPT STA ANN, V28, P120
[5]
HAYS W. P., 1926, JOUR DAIRY STI, V9, P219
[6]
KENDALL JC, 1931, NH AGR EXPT STA B, V256, P5
[7]
RAGSDALE AC, 1922, J DAIRY SCI, V5, P544
[8]
REGAN W. M., 1938, JOUR DAIRY SCI, V21, P73, DOI 10.3168/jds.S0022-0302(38)95617-6
[9]
RHOAD AD, 1941, YB USDA, P508