Columbia subject headings:
Library legislation--United States--Congresses.
School libraries--Censorship--United States--Congresses.
Textbooks--United States--Censorship--Congresses.
Harvard subject headings:
Library legislation--United States--Congresses.
Library legislation.
School libraries--Censorship--United States--Congresses.
Textbooks--Censorship--United States--Congresses.
Princeton subject headings: