Columbia subject headings:
American Library Association--History.
Cultural relations--History.
Educational exchanges--History.
International librarianship--History--20th century.
Libraries and state--United States--History--20th century.
Library science--United States--History--20th century.
United States--Relations.
Harvard subject headings:
American Library Association--History.
Cultural relations--History.
Educational exchanges--History.
International librarianship--History--20th century.
Libraries and state--United States--History--20th century.
Library science--United States--History--20th century.
United States--Relations.
Princeton subject headings:
American Library Association--History.
Cultural relations--History.
Educational exchanges--History.
International librarianship--History--20th century.
Libraries and state--United States--History--20th century.
Library science--United States--History--20th century.
United States--Relations.