共 9 条
[2]
GUERRANT N. B., 1938, JOUR DAIRY SCI, V21, P69, DOI 10.3168/jds.S0022-0302(38)95616-4
[3]
HATHAWAY IL, 1938, NEBR AGR EXPT STA RE, V103
[4]
Todhunter E. N., 1942, JOUR DAIRY SCI, V25, P1023, DOI 10.3168/jds.S0022-0302(42)95369-4
[5]
WATTS BK, 1950, USDA AGR HDB, V8
[6]
WESWIG PH, 1949, OREGON AGR EXPT STA, V17
[7]
WILSTER G. H., 1940, JOUR DAIRY SCI, V23, P197, DOI 10.3168/jds.S0022-0302(40)95511-4
[8]
1947, USDA MISC PUB, V636
[9]
1945, USDA MISC PUB, V571