共 45 条
[11]
FOSSEN OH, 1990, MEDD SVEN HUSDJURSKO, V160, P36
[12]
THE ACCURACY OF SEVERAL AIDS IN DETECTING ESTRUS IN DAIRY-CATTLE
[J].
APPLIED ANIMAL ETHOLOGY,
1983, 10 (03)
:199-208
[13]
GAUGER P, 1991, Journal of Dairy Science, V74, P228
[14]
GORDEN P, 1988, Journal of Dairy Science, V71, P136
[17]
JOHNSON D G, 1989, Journal of Dairy Science, V72, P447
[18]
JUNGEWENTRUP S, 1985, THESIS U GOETTINGEN
[20]
LAKE JR, 1987, 3RD P S AUT DAIR WAG, P159