Zeitschrift für Sexualwissenschaft
The Journal for Sexual Science was published by Magnus Hirschfeld, starting in 1908.
Vindex by Karl Heinrich Ulrichs
Published in 1864, Vindex is Karl Heinrich Ulrichs’ first text on male homosexual affection. Writing with the pseudonym Numa Numantius, Ulrichs presents his theory of the Urnings, a prototype of modern homosexual identity that Ulrichs argues is set at birth.