Columbia subject headings:
Computer terminals.
Libraries--Automation--Statistics.
Library catalogs and users.
Ohio State University. Libraries--Use studies.
Online bibliographic searching.
Online library catalogs--Use studies.
Harvard subject headings:
Computer terminals.
Libraries--Automation--Statistics.
Library catalogs and users.
Ohio State University. Libraries--Use studies.
Online bibliographic searching.
Online library catalogs--Use studies.
Princeton subject headings: