共 19 条
[1]
Amann R P, 1979, J Reprod Fertil Suppl, P1
[2]
BARTLETT JW, 1939, P AM SOC ANIM PROD, P243
[4]
GEBAUER MR, 1974, J AM VET MED ASSOC, V165, P711
[5]
GILL JL, 1971, J ANIM SCI, V33, P331
[6]
Hamilton J G, 1939, Can J Comp Med, V3, P337
[8]
LEPARD OL, 1941, J DAIRY SCI, V24, P509