Columbia subject headings:
Contaminated sediments--Mexico, Gulf of.
Water quality biological assessment--Mexico, Gulf of.
Water--Pollution--Mexico, Gulf of--History.
Harvard subject headings:
Contaminated sediments--Mexico, Gulf of.
Water quality biological assessment--Mexico, Gulf of.
Water--Pollution--Mexico, Gulf of--History.
Princeton subject headings:
Contaminated sediments--Mexico, Gulf of.
Water quality biological assessment--Mexico, Gulf of.
Water--Pollution--Mexico, Gulf of--History.