Columbia subject headings:
Books--Conservation and restoration--Standards--United States.
Library materials--Conservation and restoration--Standards--United States.
Paper--Preservation--Standards--United States.
Harvard subject headings:
Books--Conservation and restoration--United States--Standards.
Library materials--Conservation and restoration--Standards--United States.
Paper--Preservation--Standards--United States.
Princeton subject headings:
Books--Conservation and restoration--Standards--United States.
Library materials--Conservation and restoration--Standards--United States.
Paper--Preservation--Standards--United States.