Columbia subject headings:
Authors, Austrian--20th century--Biography--Congresses.
Mell, Max, 1882-1971--Congresses.
Harvard subject headings:
Authors, Austrian--20th century--Biography--Congresses.
Mell, Max, 1882-1971--Congresses.
Princeton subject headings:
Authors, Austrian--20th century--Biography--Congresses.
Mell, Max, 1882-1971--Congresses.