—— Strength of Ten. 1909.
Henderson, C.R. Education with Reference to Sex. National Society for the Scientific Study of Education. 8th Yearbook, 1909.
Lyttleton, Edward. Training of the Young in Laws of Sex. New York, 1900.
Manny, F.A. Bibliography of Sex Hygiene. Educational Review, vol. 46, pp. 168-76, September, 1913.
Moll, Albert. Sexual Life of the Child. New York, 1912.
Phelps, Jessie. Teaching of Sex in Normal Schools. National Conference of Charities and Corrections. Proceedings, 1912, pp. 267-70.
Putnam, H.C. Sex Instruction in Schools. National Society for the Scientific Study of Education. 8th Yearbook, 1909, pt. 2.
Society of Sanitary and Moral Prophylaxis. Educational pamphlets.
No. 1. Young Man's Problem.
No. 2. Instruction in Physiology and Hygiene of Sex for Teachers.
No. 3. Relations of Social Diseases with Marriage and their Prophylaxis.
No. 4. Boy Problem.
No. 5. How my Uncle the Doctor instructed me in Matters of Sex.
No. 6. Health and Hygiene of Sex.
Thomas, W.I. Sex and Society. Chicago, 1907.
Wagner, Charles. Youth. New York, 1905. Book 3.