In 1966 Dr. Harry Benjamin (who worked with Lynn) documented early 20th century hormone research and treatment options in his book, "The Transsexual Phenomenon

In 1966 Dr. Harry Benjamin (who worked with Lynn) documented early 20th century hormone research and treatment options in his book, "The Transsexual Phenomenon": https://en.wikipedia.org/wiki/The_Transsexual_Phenomenon https://en.wikipedia.org/wiki/The_Transsexual_Phenomenon