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2. Control of spermatogenesis in men by combined administration of progestin and androgen;Frick;Contraception,1973
3. Sanwal, P.C., Sundby, A., and Edqvist, L.-E.: The diurnal variation of peripheral plasma levels of testosterone in bulls measured by a rapid radioimmunoassay procedure. Acta vet. Scand., in press.
4. Nygren, K.G., Martinsson, K., Lindberg, P., and Johansson, E.D.B.: Peripheral plasma levels of norethindrone by radioimmunoassay after oral administration in humans, in preparation.
5. Successful inhibition of spermatogenesis in men without loss of libido: A potential new approach to male contraception;Coutinho;Contraception,1973