Cyclic changes in the testis and vas deferens of the rainbow trout (Salmo gairdneri) with special reference to sites of steroidogenesis R. VAN DEN HURK, J. A. J. VERMEIJ, J. STEGENGA, J. PEUTE and P. G. W. J. VAN OORDTAnn. Biol. anim. Bioch. Biophys., 18 4 (1978) 899-904DOI: https://doi.org/10.1051/rnd:19780522