Columbia subject headings:
Harvard subject headings:
Coastwise shipping--Law and legislation--United States
Maritime law--United States.
Merchant marine--United States
United States--Appropriations and expenditures.
United States. Department of Transportation--Appropriations and expenditures.
Princeton subject headings:
Coastwise shipping--Law and legislation--United States.
Merchant marine--United States.
United States--Appropriations and expenditures.
United States. Department of Transportation--Appropriations and expenditures.