Woolley, D M Freeze-substitution: a method for the rapid arrest and chemical fixation of spermatozoa. [electronic resource] - Journal of microscopy Aug 1974 - 245-60 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0022-2720 Standard No.: 10.1111/j.1365-2818.1974.tb03950.x doi Subjects--Topical Terms: AcetoneAnimalsCell Nucleus--ultrastructureChlorofluorocarbons, MethaneColloidsEthylene GlycolsEvaluation Studies as TopicFlagella--ultrastructureFormaldehydeFreezingGlutaralHistological TechniquesMaleMicroscopy, ElectronMicroscopy, Phase-ContrastOsmiumRatsSolventsSpermatozoa--ultrastructure