Columbia subject headings:
Harvard subject headings:
Hirschfeld, Magnus, 1868-1935
Homosexuality--Germany--History.
Sexologists--Germany--Biography.
Sexology--Germany--History.
Princeton subject headings:
Germany.
Hirschfeld, Magnus, 1868-1935.
Homosexuality--History.
Research--History.
Sex--History.
Sexologists--Germany--Biography.
Sexology.