Columbia subject headings:
Petroleum industry and trade--Australia--History.
Petroleum industry and trade--Papua New Guinea--History.
Petroleum--Prospecting--Australia--History.
Petroleum--Prospecting--Papua New Guinea--History.
Harvard subject headings:
Explorers--Australia--History.
Explorers--Australia.
Explorers--Papua New Guinea--History.
Explorers--Papua New Guinea.
Petroleum--Prospecting--Australia--History.
Petroleum--Prospecting--Papua New Guinea--History.
Princeton subject headings: