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Three Contributions to the Theory of Sex

The Sex Worship and Symbolism of Primitive Races: An Interpretation

The Sex Side of Life: An Explanation for Young People

Self Knowledge and Guide to Sex Instruction: Vital Facts of Life for All Ages

Religion & Sex: Studies in the Pathology of Religious Development

Plain Facts for Old and Young

Aphrodisiacs and Anti-aphrodisiacs: Three Essays on the Powers of Reproduction