Columbia subject headings:
Books--Prices--Indexes--Standards--United States.
Library finance--Statistics--Standards--United States.
Library materials--Prices--Indexes--Standards--United States.
Library statistics--Standards--United States.
Price indexes--Standards--United States.
Harvard subject headings:
Books--Prices--Indexes--Standards--United States.
Library finance--Statistics--Standards--United States.
Library materials--Prices--Indexes--Standards--United States.
Library statistics--Standards--United States.
Price indexes--Standards--United States.
Princeton subject headings: