Columbia subject headings:
Depository libraries--Reference services--United States.
Government information--United States.
Government publications--United States.
Libraries--Special collections--Government publications.
Reference services (Libraries)--United States.
Harvard subject headings:
Academic libraries--Reference services--United States.
Academic libraries--United States--Reference services.
Depository libraries--Reference services--United States.
Government information--United States
Government publications--United States.
Libraries--Special collections--Government publications
Library surveys--United States.
Princeton subject headings:
Academic libraries--Reference services--United States.
Depository libraries--United States--Reference services.
Government information--United States.
Government publications--United States.
Libraries--Special collections--Government publications.
Library surveys--United States.