Columbia subject headings:
Commercial products--Periodicals.
Commercial products--United States--Periodicals.
Commercial products--United States.
Consumer education--Periodicals.
Purchasing--Periodicals.
Harvard subject headings:
Commercial products--Periodicals
Commercial products--United States--Periodicals.
Consumer education--Periodicals
Periodicals
Purchasing--Periodicals
Princeton subject headings:
Commercial products--Periodicals.
Commercial products--United States--Periodicals.
Consumer education--Periodicals.
Periodicals.
Purchasing--Periodicals.