Columbia subject headings:
Book industries and trade--Periodicals.
Information science--Periodicals.
Libraries--United States--Periodicals.
Library science--Periodicals.
Harvard subject headings:
Bibliography
Book industries and trade--Periodicals
Information science--Periodicals
Libraries--United States--Periodicals.
Library science--Periodicals
Princeton subject headings:
Book industries and trade--Periodicals.
Information science--Periodicals.
Libraries--United States--Periodicals.
Library science--Periodicals.
Periodicals.