Columbia subject headings:
Harvard subject headings:
Drugs--Cameroon--Analysis--History.
Health products--Cameroon--History.
Selling--Drugs--Cameroon--History.
Transportation medicine--Cameroon--History.
Princeton subject headings:
Drugs--Cameroon--Analysis--History.
Health products--Cameroon--History.
Selling--Drugs--Cameroon--History.
Transportation medicine--Cameroon--History.