共 19 条
[1]
ANDERSON EC, 1971, RES VET SCI, V12, P342
[3]
BOURNE FJ, 1971, VET ANN, V12, P74
[4]
BRAMBELL FWR, 1958, VET REC, V70, P1060
[5]
BROWN P, 1976, AGR RES SEMINAR PORC, P60
[7]
CURTIS J, 1973, IMMUNOLOGY, V24, P147
[8]
Dujin T. Z., 1971, Acta Veterinaria, Yugoslavia, V21, P111