Columbia subject headings:
Industrial districts--Law and legislation--United States--Case studies.
Industrial districts--United States--Case studies.
Research parks--Law and legislation--United States.
Research parks--United States--Case studies.
Zoning--United States.
Harvard subject headings:
Industrial districts--Law and legislation--United States.
Real covenants--United States.
Research parks--United States--Case studies.
Zoning law--United States.
Zoning--United States.
Princeton subject headings:
Industrial districts--Lawand legislation--United States.
Real covenants--United States.
Zoning law--United States.