共 14 条
[1]
BAKER HJ, 1968, J AM VET MED ASSOC, V153, P1618
[4]
GILL JL, 1971, J ANIM SCI, V33, P331
[7]
LEUNG K, 1976, J DAIRY SCI S1, V60, P139
[8]
MCCAULEY EH, 1972, BOVINE PRACT, V7, P22
[10]
STEEL RGD, 1969, PRINCIPLES PROCEDURE