Columbia subject headings:
Drugs--Catalogs--Periodicals.
Drugs--Prices--United States--Periodicals.
Pharmaceutical industry--United States--Periodicals.
Harvard subject headings:
Drugs--Catalogs--Periodicals.
Drugs--Prices--United States--Periodicals.
Pharmaceutical industry--United States--Periodicals
Princeton subject headings:
Drugs--Catalogs--Periodicals.
Drugs--Prices--United States--Periodicals.
Periodicals.
Pharmaceutical industry--United States--Periodicals.