共 17 条
[1]
ALMQUIST H. J., 1933, POULTRY SCI, V12, P83, DOI 10.3382/ps.0120083
[4]
COTTERILL OJ, 1962, 12 P WORLDS POULTR C, P443
[6]
FRIESE W, 1924, CA297, V18
[7]
Friese W., 1923, Z F UNTERS NAHR U GE, V46, P33, DOI [10.1007/bf02107736, DOI 10.1007/BF02107736]
[9]
JENKINS N. K., 1960, JOUR AGRIC SCI, V55, P323
[10]
Jull M. A., 1924, POULTRY SCI, V3, P77