Columbia subject headings:
Factory and trade waste--Congresses.
Marine pollution--Congresses.
Waste disposal in the ocean--Congresses.
Harvard subject headings:
Factory and trade waste--Congresses
Marine pollution--Congresses
Waste disposal in the ocean--Congresses.
Princeton subject headings:
Factory and trade waste--Congresses.
Marine pollution--Congresses.
Waste disposal in the ocean--Congresses.