Columbia subject headings:
Children's libraries--United States--History--20th century--Congresses.
Children's literature, American--History and criticism--Congresses.
Children's literature--Publishing--United States--History--20th century--Congresses.
Children--Books and reading--United States--History--20th century--Congresses.
Harvard subject headings:
Princeton subject headings:
Children's libraries--United States--History--20th century--Congresses.
Children's literature, American--History and criticism--Congresses.
Children's literature--Publishing--United States--History--20th century--Congresses.
Children--Books and reading--United States--History--20th century--Congresses.