Hartman, C. G. (1962). Science and the safe period: A compendium of human reproduction. Williams & Wilkins.
Chicago Style aipamenaHartman, Carl Gottfried. Science and the Safe Period: A Compendium of Human Reproduction. Baltimore: Williams & Wilkins, 1962.
MLA aipamenaHartman, Carl Gottfried. Science and the Safe Period: A Compendium of Human Reproduction. Williams & Wilkins, 1962.
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