共 17 条
[1]
Al-Rawi B., 1975, Applied Animal Ethology, V2, P69, DOI 10.1016/0304-3762(75)90066-8
[2]
Bareham J. R., 1976, Applied Animal Ethology, V2, P291, DOI 10.1016/0304-3762(76)90064-X
[4]
CHRISTIANSEN A, 1974, DANSK ERHVERVSFJERKR, V3, P403
[8]
LIEN S, 1975, AKTUELT LANDBRUKSDEP, V1, P67
[9]
MARTIN GA, 1973, POULTRY SCI, V52, P2058