Columbia subject headings:
Construction industry--Subcontracting--United States.
Letting of contracts--United States.
Public contracts--United States.
Harvard subject headings:
Construction industry--Subcontracting--United States.
Letting of contracts--United States.
Public contracts--United States.
Princeton subject headings:
Construction industry--Subcontracting--United States.
Letting of contracts--United States.
Public contracts--United States.