Columbia subject headings:
Oil pollution of rivers, harbors, etc.--British Columbia--Georgia, Strait of.
Oil pollution of rivers, harbors, etc.--Law and legislation--Canada.
Oil pollution of rivers, harbors, etc.--Law and legislation--United States.
Oil pollution of rivers, harbors, etc.--Washington (State)--Puget Sound.
Harvard subject headings:
Oil pollution of rivers, harbors, etc.--British Columbia--Georgia, Strait of.
Oil pollution of rivers, harbors, etc.--Law and legislation--Canada.
Oil pollution of rivers, harbors, etc.--Law and legislation--United States.
Oil pollution of rivers, harbors, etc.--Washington (State)--Puget Sound.
Princeton subject headings:
Oil pollution of rivers, harbors, etc.--Georgia, Strait of (B.C. and Wash.).
Oil pollution of rivers, harbors, etc.--Law and legislation--Canada.
Oil pollution of rivers, harbors, etc.--Law and legislation--United States.
Oil pollution of rivers, harbors, etc.--Washington (State)--Puget Sound.