Columbia subject headings:
Medical economics--United States--Periodicals.
Medical economics--United States--Statistics--Periodicals.
Medicine--Practice--United States--Statistics--Periodicals.
Physicians--United States--Statistics--Periodicals.
Harvard subject headings:
Medical economics--United States--Periodicals.
Medical economics--United States--Statistics--Periodicals.
Medicine--Practice--United States--Statistics--Periodicals.
Physicians--United States--Statistics--Periodicals.
Princeton subject headings:
Medical economics--United States--Periodicals.
Medical economics--United States--Statistics--Periodicals.
Medicine--Practice--United States--Statistics--Periodicals.
Periodicals.
Physicians--United States--Statistics--Periodicals.