共 29 条
[21]
PETIT M, 1980, 9TH C AN REPR INS AR, V3, P136
[22]
Philipsen H., 1978, Arsberetning, Institut for Sterilitetsforskning, Kongelige Veterinaer- og Landbohoejskole, V21, P165
[25]
SCHMIDT W, 1977, THESIS MUNCHEN, P1
[26]
SPECKER CD, 1980, THESIS MUNCHEN, P1
[27]
BIOTECHNICAL MEASURES FOR IMPROVEMENT OF FERTILITY IN CATTLE
[J].
LIVESTOCK PRODUCTION SCIENCE,
1981, 8 (03)
:215-231
[28]
VOSS HJ, 1984, ZUCHTHYGIENE, V19, P14
[29]
WITTKOWSKI G, 1982, DEUT TIERARZTL WOCH, V89, P244