Essays in War-Time: Further Studies in the Task of Social Hygiene

Studies in the Psychology of Sex, Volume 5 / Erotic Symbolism; The Mechanism of Detumescence; The Psychic State in Pregnancy

Studies in the Psychology of Sex, Volume 3 / Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women

Studies in the Psychology of Sex, Volume 1 / The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism

Studies in the Psychology of Sex, Volume 4 / Sexual Selection In Man

Studies in the Psychology of Sex, Volume 2 / Sexual Inversion