Columbia subject headings:
Harvard subject headings:
Diplomatic and consular service, German--Iran--History.
Diplomats--Germany--Biography
Germans--Iran--Biography.
Subversive activities--Iran--History.
Wassmuss, Wilhelm, 1880-1931.
World War, 1914-1918--Iran
World War, 1914-1918--Secret service--Germany
World War, 1914-1918--Underground movements--Iran.
Princeton subject headings:
Diplomatic and consular service, German--Iran--History.
Germans--Iran--Biography.
Subversive activities--Iran--History.
Wassmuss, Wilhelm, 1880-1931.
World War, 1914-1918--Iran.
World War, 1914-1918--Secret service--Germany.
World War, 1914-1918--Underground movements--Iran.