共 8 条
[1]
Barber C. W., 1955, Cornell Veterinarian, V43, P360
[4]
GARDINER JL, 1950, P HELM SOC WASH, V17, P25
[5]
MARTHEDAL H. E., 1957, NORDISK VETERINAER MED, V9, P373
[7]
OTT WH, 1955, POULTRY SCI, V34, P1215