1921, April: Dr. Otto V. Huffman: "Relation of Heterosexual Character to Neoplasms"
Dr. Otto V. Huffman (New York). "Relation of Heterosexual Character to Neoplasms and Developmental Errors." "Read by title: Summary." Proceedings of the American Association for Cancer Research, Fourteenth Annual Meeting Held in Cleveland, Ohio, March 24, 1921. Journal of Cancer Research, Volume 6, No. 2 (Baltimore: Williams & Wilkins: April 1921), p. 186. Accessed April 26, 2016 from https://books.google.com/books?id=KlA9AQAAMAAJ&pg=PA186&dq=%22heterosexuality%22&hl=en&sa=X&ved=0ahUKEwjBmPWhnq3MAhWLFj4KHYSaCD0Q6AEIIjAB#v=onepage&q=%22heterosexuality%22&f=false