Columbia subject headings:
Deep diving--Oman--History.
Oman--Economic conditions.
Oman--Social conditions.
Pearl divers--Oman--History.
Pearl fisheries--Oman--History.
Harvard subject headings:
Deep diving--Oman--History.
Oman--Economic conditions.
Oman--Social conditions.
Pearl divers--Oman--History.
Pearl fisheries--Oman--History.
Pearl industry and trade--Oman--History.
Princeton subject headings:
Deep diving--Oman--History.
Oman--Economic conditions.
Oman--Social conditions.
Pearl divers--Oman--History.
Pearl fisheries--Oman--History.
Pearl industry and trade--Oman--History.