1. Bartke, A., 1968, Pregnancy blocking by yellow (Ara) and non-yellow (aa) male mice, Genetics, 60: 161.
2. Bartke, A., 1974, Increased sensitivity of seminal vesicles to testosterone level, J. Endocr., 60: 145.
3. Bertram, B. C. R., 1975, Social factors influencing reproduction in wild lions, J. Zool. (Lond.), 177: 463.
4. Boonstra, R., 1980, Infanticide in microtines: importance in natural populations, Oecologia, 46: 262.
5. Bronson, F. H., and Caroom, D., 1971, Preputial gland of the male