Columbia subject headings:
Export sales contracts--United States.
Export sales contracts.
Foreign trade regulation--United States.
Foreign trade regulation.
Harvard subject headings:
Export sales contracts--United States.
Export sales contracts.
Foreign trade regulation--United States.
Foreign trade regulation.
United States--Commerce.
Princeton subject headings:
Export sales contracts--United States.
Export sales contracts.
Foreign trade regulation--United States.
Foreign trade regulation.