1. Adler, W. H., Takiguchi, T., and Smith, R. T. 1971. Effect of age upon primary alloantigen recognition by mouse spleen cells. J. Immunol. 107: 1357–1362.
2. Albertsson, P. A., and Baird, G. D. 1962. Counter-current distribution of cells. Exp. Cell Res. 28: 296–322.
3. Albrecht, E. D. 1981. Effect of aging and adrenocorticotropin on adrenal A5-3/3-hydroxysteroid dehydrogenase activity in male rats. Exp. Aging Res. 7: 11–15.
4. Albrecht, E. D., Koos, R. D., and Wehrenberg, W. B. 1977. Aging and adrenal A5-3ß-hydroxy- steroid dehydrogenase in female mice. J. Endocrinol. 73: 193–194.
5. Arutyunyan, G. S., Mashkovskii, M. D., and Roshchina, L. F. 1964. Pharmacological properties of melatonin. Fed. Proc. 23: T1330–T1332.