Columbia subject headings:
Librarians--Salaries, etc.--United States--Periodicals.
Library surveys--United States--Periodicals.
Harvard subject headings:
Librarians--Salaries, etc.--United States--Periodicals.
Library surveys--United States--Periodicals.
Princeton subject headings:
Librarians--Salaries, etc.--United States--Periodicals.
Library surveys--United States--Periodicals.