title: Electron microscopic investigations on bull sperms. (Defective cell types and a new, complex interpretation of cell defectiveness).
mesh_terms: D000818:Animals; D002417:Cattle; D003720:Densitometry; D008297:Male; D008854:Microscopy, Electron; D013094:Spermatozoa / Q000166:cytology* / Q000502:physiology