Columbia subject headings:
Harvard subject headings:
Authors, German--20th century--Biography
Bonsels, Waldemar, 1880 or 1881-1952
Hahn, Hans, 1880-1918--Friends and associates.
Journalists--Germany--Biography
Princeton subject headings:
Bonsels, Waldemar, 1880 or 1881-1952--Friends and associates.
Hahn, Hans, 1880-1918--Friends and associates.
Hahn, Hans, 1880-1918.
Journalists--Germany--Biography.