Columbia subject headings:
Defense contracts--United States--History.
Government purchasing--United States--History.
Public contracts--United States--History.
United States--Armed Forces--Procurement--History.
Harvard subject headings:
Defense contracts--United States--History.
Government purchasing--Law and legislation--United States--History.
Government purchasing--United States--History.
Public contracts--United States--History.
United States--Armed Forces--Procurement--History.
Princeton subject headings:
Government purchasing--Law and legislation--United States--History.
Public contracts--United States--History.