Columbia subject headings:
Libraries--United States--Automation.
Library catalogs--Use studies.
Library surveys--United States.
Online bibliographic searching.
Online library catalogs--Use studies.
Harvard subject headings:
Libraries--United States--Automation.
Library catalogs--Use studies
Library surveys--United States
Online bibliographic searching
Online library catalogs--Use studies
Princeton subject headings:
Libraries--United States--Automation.
Library catalogs--Use studies.
Library surveys--United States.
Online bibliographic searching.
Online library catalogs--Use studies.