共 24 条
- [1] ANDRESEN E, 1959, 6 INT BROODGR C MUN, P24
- [2] ASHTON G. C., 1960, JOUR AGRIC SCI, V54, P321, DOI 10.1017/S0021859600021249
- [4] BARR HL, 1960, THESIS OHIO STATE U
- [5] COMBERG G., 1964, Zuchtungskunde, V36, P248
- [8] FOWLER AK, 1963, THESIS OHIO STATE U
- [9] HOGREVE F., 1965, Tierarztliche Umschau, V20, P17
- [10] HOGREVE F., 1966, Tierarztliche Umschau, V21, P69