共 14 条
- [1] ACHENS A, 1915, TIERARZTLICHE WOCHEN, V31, P559
- [2] Bywaters JH, 1937, GENETICS, V22, P457
- [3] CARMICHAEL WJ, 1920, ILLINOIS AGR EXP STA, V226
- [4] Comstock R. E., 1944, JOUR ANIMAL SCI, V3, P380
- [5] CRAFT WA, 1949, J ANIMAL SCI, V10, P3
- [8] DONALD H. P., 1939, EMPIRE JOUR EXP AGRIC, V7, P32
- [9] FINE NC, 1951, THESIS U MINNESOTA
- [10] JOHANSSON I, 1924, Z TIERSUCHTUNG ZUCHT, V15, P62