NIESCHLAG EBERHARD 550,184 SPERMATOGENESIS Spermatogenesis - fertilization - contraception : molecular, cellular and endocrine events in male reproduction /E[berhard] Nieschlag, U[rsula]F. Habenicht eds. ; S. Nieschlag ed. ass. - Berlin [etc]. : Springer-Verl. , [1992] - XVI, 512 s. : il., wykr. ; 22 cm (Schering Foundation Workshop 4) ISBN 3-540-55436-X Springer-Verl. Berlin [etc.] ISBN 0-387-55436-X Springer-Veri. New York [etc.]