Columbia subject headings:
Academic libraries--United States.
Depository libraries--United States--Use studies.
Depository libraries--United States.
Government publications--United States--Use studies.
Government publications--Use studies.
Library use studies--United States.
Harvard subject headings:
Academic libraries--United States.
Depository libraries--United States--Use studies.
Depository libraries--United States.
Government publications--United States--Use studies.
Government publications--Use studies.
Library use studies--United States.
Princeton subject headings:
Depository libraries--United States--Use studies.
Government publications--United States--Use studies.
Library use studies--United States.