Columbia subject headings:
Harvard subject headings:
Communists--Switzerland--Biography--Congresses.
Grimm, Robert, 1881-1958--Bibliography.
Grimm, Robert, 1881-1958--Congresses.
Politicians--Switzerland--Biography--Congresses.
Switzerland--Politics and government--20th century--Congresses.
Princeton subject headings:
Grimm, Robert, 1881-1958--Criticism and interpretation--Congresses.