Template:Ref-Painter1923
From Embryology
Painter TS. Studies in mammalian spermatogenesis II. The spermatogenesis of man. (1923) J Exp. Zool. 37(3): 292- .
Painter TS. Studies in mammalian spermatogenesis II. The spermatogenesis of man. (1923) J Exp. Zool. 37(3): 292- .