Totem und Tabu: Einige Übereinstimmungen im Seelenleben der Wilden und der Neurotiker.

Freud's primary contribution to medical anthropology. First translated into English by A. A. Brill as Totem and taboo: Resemblances between the psychic lives of savages and neurotics (1919). Digital facsimile of the 1913 edition from the Internet Archive at this link; of the 1919 English translation from st.mary-ca.edu at this link. Retranslated by James Strachey in 1950; digital facsimile of the 1950 translation from the Internet Archive at this link.