Columbia subject headings:
Ocean mining--Congresses.
Ocean mining--Law and legislation--Congresses.
Harvard subject headings:
Marine mineral resources--Law and legislation--Congresses.
Ocean bottom--Law and legislation--Congresses.
Ocean mining--Congresses.
Ocean mining--Law and legislation--Congresses.
Princeton subject headings:
Ocean mining--Congresses.
Ocean mining--Law and legislation--Congresses.