1. Arai, Y., and Gorski, R. A. Possible participation of pituitary testicular feedback regulation in the sexual differentiation of the brain in the male rat. In M. Kawakami (Ed.), Rhythms in Neuroendocrine Activity. Tokyo: Igaku Shoin, 1974.
2. Badway, D., Orth, J., and Weisz, J. Effect of morphine on 6,5–30-ol-steroid dehydrogenase in Leydig cells of fetal rats: A quantitative cytochemical study. Anatomical Record, 1981, 199, 15a.
3. Bardin, C. W., and Peterson, R. E. Studies of androgen production by the rat: Testosterone and androstenedione content of blood. Endocrinology, 1967, 80, 38–44.
4. Barraclough, C. A. Induction of ovulation in the sterile rat by hypothalamic stimulation. Anatomical Record, 1959, 133, 248.
5. Barraclough, C. A. Production of anovulatory, sterile rats by single injections of testosterone propionate. Endocrinology, 1961, 68, 62–67.