Columbia subject headings:
Libraries--Automation--Congresses.
Library administration--Congresses.
Library catalogs--Congresses.
Machine-readable bibliographic data--Congresses.
Harvard subject headings:
Libraries--Automation--Congresses
Library administration--Congresses.
Library catalogs--Congresses.
Machine-readable bibliographic data--Congresses.
Princeton subject headings:
Libraries--Automation--Congresses.
Library administration--Congresses.
Library catalogs--Congresses.
Machine-readable bibliographic data--Congresses.