Columbia subject headings:
Harvard subject headings:
Pesticides industry--Prices--Law and legislation--Canada.
Pesticides industry--Prices--Law and legislation--United States.
Pesticides--Prices--Canada.
Pesticides--Prices--United States.
Princeton subject headings:
Pesticides industry--Prices--Law and legislation--Canada.
Pesticides industry--Prices--Law and legislation--United States.
Pesticides--Prices--Canada.
Pesticides--Prices--United States.