title: Quantitative studies on the seasonal development of the deferent ducts in passerine birds.
authors.forename: E
authors.initials: E
authors.lastname: WITSCHI
mesh_terms: D000818:Animals; D001717:Birds; D005835:Genitalia; D006801:Humans; D008297:Male; D012621:Seasons; D014649:Vas Deferens
keywords: GENITALS/physiological comparison; VAS DEFERENS/physiological comparison