[Spermatogenesis of animals revealed by the electron microscope. IX. Electron microscopic study of the telophase of spermatocytes of Cipangopaludina malleata and Gelastorrhinus bicoler of Haan with remarks on Nebenkerns.]

[Spermatogenesis of animals revealed by the electron microscope. IX. Electron microscopic study of the telophase of spermatocytes of Cipangopaludina malleata and Gelastorrhinus bicoler of Haan with remarks on Nebenkerns.]