Columbia subject headings:
Harvard subject headings:
Educators--Germany--Congresses.
Legislators--Germany--Congresses.
Pacifists--Germany--Congresses.
Siemsen, Anna, 1882-1951--Congresses.
Princeton subject headings:
Educators--Germany--Congresses.
Legislators--Germany--Congresses.
Pacifists--Germany--Congresses.
Siemsen, Anna, 1882-1951--Congresses.