Columbia subject headings:
Harvard subject headings:
Information retrieval--Automation--Periodicals.
Online bibliographic searching--Periodicals.
Searching, Bibliographical--Automation--Periodicals.
Subject catalogs--Periodicals.
Subject headings--Evaluation--Periodicals.
Princeton subject headings:
Information retrieval--Automation--Periodicals.
Online bibliographic searching--Periodicals.
Searching, Bibliographical--Automation--Periodicals.
Subject catalogs--Periodicals.
Subject headings--Evaluation--Periodicals.