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Kazuhiro Satoh, Sigeaki Satoh, Ikuo Maehara, Seiichi Orikasa. "STUDIES ON HUMAN SPERMATOZOAL ACROSOME USING SPERMAC STAIN IN FERTILE AND INFERTILE MEN INCLUDING TWO CASES OF ROUND-HEADED SPERMATOZOA." The Japanese Journal of Urology (1989) 562-568