Columbia subject headings:
Architects--Legal status, laws, etc.--United States.
Engineers--Legal status, laws, etc.--United States.
Harvard subject headings:
Architects--Legal status, laws, etc.--United States
Engineers--Legal status, laws, etc.--United States
Princeton subject headings:
Architects--Legal status, laws, etc.--United States.
Engineers--Legal status, laws, etc.--United States.