共 171 条
[41]
DAGOSTINO, 1951, B SOC ITAL BIOL SPER, V27, P1551
[42]
DALE, 1954, CORNELL VET, V44, P368
[43]
DAVIDSON, 1954, J SIC FD AGR, V5, P86
[45]
DAWBARN, 1952, NATURE, V170, P793
[46]
DOETSCH, 1953, J DAIRY SCI, V36, P588
[47]
DOETSCH, 1954, J DAIRY SCI, V37, P662