Columbia subject headings:
Maritime law--United States.
Merchant marine--Soviet Union.
Merchant marine--United States.
Shipping bounties and subsidies--United States.
Shipyards--Japan.
Harvard subject headings:
Maritime law--United States.
Merchant marine--Soviet Union
Merchant marine--United States
Shipping bounties and subsidies--United States.
Shipyards--Japan.
Princeton subject headings: