1. Research needs in beef cattle reproduction;Wiltbank;J. Anim. Sci.,1970
2. Increase beef cow productivity by increasing reproductive performance;Spitzer;Colorado State University Experiment Station Bulletin,1975
3. Management of replacement heifers for a high reproductive and calving rate;Beverly;Texas A&M University Bulletin No. 1213,1979
4. Hormone treatments and use of calf removal in post-partum beef cows;Smith;J. Anim. Sci.,1979
5. Nutrition and the post-partum interval of the ewe, sow and cow;Dunn;J. Anim. Sci.,1980