共 11 条
[1]
BROWNLIE W. M., 1954, British Veterinary Journal, V110, P447
[2]
COOP I. E., 1955, NEW ZEALAND JOUR SCI AND TECHNOL SER A, V37, P214
[3]
DAVIES G. M., 1954, Scottish Agriculture, V34, P149
[4]
ESPLIN AC, 1940, 292 B UT AGR EXP STN
[5]
FRASER A. H. H., 1937, Scottish Journal of Agriculture, V20, P166
[9]
MUNRO J, 1954, THESIS ABERDEEN U
[10]
PURSER A. F., 1964, ANIM PROD, V6, P273