Columbia subject headings:
Medical fees--United States--Statistics--Periodicals.
Medicine--Practice--United States--Statistics--Periodicals.
Physicians--Salaries, etc.--United States--Statistics--Periodicals.
Harvard subject headings:
Medical fees--United States--Statistics--Periodicals.
Medicine--Practice--United States--Statistics--Periodicals.
Physicians--Salaries, etc.--United States--Statistics--Periodicals.
Princeton subject headings:
Medical fees--United States--Statistics--Periodicals.
Medicine--Practice--United States--Statistics--Periodicals.
Periodicals.
Physicians--Salaries, etc.--United States--Statistics--Periodicals.
Statistics.