1. Research needs in beef cattle reproduction;Wiltbank;J. Anim. Sci.,1970
2. Studies on the postpartum cow;Casida,1968
3. Postpartum estrus as an indicator of reproductive status in the dairy cow;Thatcher;J. Dairy Sci.,1973
4. Effects of suckling on interval to first postpartum ovulation and on serum luteinizing hormone and prolactin in Holsteins;Carruthers;J. Anim. Sci.,1977
5. Effect of energy intake and once daily suckling on postpartum interval in Brahman × Hereford heifers;Randel,1977