Columbia subject headings:
Association of Research Libraries--Statistics--Periodicals.
Library materials--Conservation and restoration--United States--Statistics--Periodicals.
Harvard subject headings:
Association of Research Libraries--Statistics--Periodicals.
Library materials--Conservation and restoration--United States--Statistics--Periodicals.
Princeton subject headings:
Association of Research Libraries--Statistics--Periodicals.
Library materials--Conservation and restoration--United States--Statistics--Periodicals.
Periodicals.
Statistics.