共 10 条
- [1] FREDEEN H. T., 1962, CANADIAN JOUR ANIMAL SCI, V42, P232
- [4] JARMOLUK L, 1965, MED RADIOGRAPHY PHOT, V41
- [5] KING J. W. B., 1960, Animal Prod., V2, P59
- [6] KLEISCH J, 1956, ZUCHTUNGSKUNDE, V28, P208
- [8] SHAW A. M., 1929, SCI AGRIC, V10, P23
- [9] TUFF PER, 1936, ZEIT SCHR ZUCHT REIHE B TIERZUCHT U ZUCHTUNGSBIOL, V35, P213
- [10] WALLEY JK, 1951, VET REC, V63, P628