Columbia subject headings:
Harvard subject headings:
Communism--United States--History--20th century
Communist Party of the United States of America--History--20th century.
United States--Economic conditions--1918-1945.
United States--Politics and government--1919-1933.
United States--Politics and government--1933-1945.
Princeton subject headings:
Communism--United States--History--20th century.
Communist Party of the United States of America--History--20th century.
United States--Economic conditions--1918-1945.
United States--Politics and government--1919-1933.
United States--Politics and government--1933-1945.