Columbia subject headings:
Books and reading.
Public services (Libraries)
United States--Economic conditions--1918-1945.
United States--Social conditions.
Harvard subject headings:
Books and reading.
Public services (Libraries)
United States--Economic conditions--1918-1945.
United States--Social conditions.
Princeton subject headings:
Books and reading.
Public services (Libraries)
United States--Economic conditions--1918-1945.
United States--Social conditions.