1. Controlled breeding in cattle;Gordon;Anim. Breeding Abst.,1976
2. Progress toward fixed-time sheep A.I. and twinning in beef cattle;Gordon;World Review of Anim. Prod.,1976
3. Cattle twinning by nonsurgical egg transfer;Gordon,1977
4. Twinning in cattle;Hendy;Anim. Breed. Abst.,1970
5. Multiple births in cattle: an assessment;Lamond;Theriogenology,1974