Columbia subject headings:
Education and state--United States--History--20th century.
Federal aid to education--United States--History--20th century.
Harvard subject headings:
Education and state--United States--History--20th century.
Federal aid to education--United States--History--20th century.
Princeton subject headings:
Education and state--United States--History--20th century.
Federal aid to education--United States--History--20th century.