Columbia subject headings:
American Library Association--History.
Libraries--United States--History.
Library science--United States--History.
Trade associations--United States--History.
Harvard subject headings:
American Library Association--History.
Libraries--United States--History
Library science--United States--History.
Professional associations--United States--History.
Trade associations--United States--History.
Princeton subject headings:
American Library Association--History.
Libraries--United States--History.
Library science--United States--History.
Professional associations--United States--History.