Columbia subject headings:
Consolidation and merger of corporations--United States.
Offshore oil well drilling--Economic aspects--Mexico, Gulf of.
Oil and gas leases--Mexico, Gulf of.
Petroleum industry and trade--Mexico, Gulf of.
United States. Minerals Management Service. Gulf of Mexico OCS Region.
Harvard subject headings:
Consolidation and merger of corporations--United States.
Offshore oil well drilling--Economic aspects--Mexico, Gulf of.
Oil and gas leases--Mexico, Gulf of.
Petroleum industry and trade--Mexico, Gulf of.
United States. Minerals Management Service. Gulf of Mexico OCS Region.
Princeton subject headings:
Consolidation and merger of corporations--United States.
Offshore oil well drilling--Economic aspects--Mexico, Gulf of.
Oil and gas leases--Mexico, Gulf of.
Petroleum industry and trade--Mexico, Gulf of.
United States. Minerals Management Service. Gulf of Mexico OCS Region