Columbia subject headings:
Environmental policy--Hudson River Valley (N.Y. and N.J.)
Environmental policy--New York Metropolitan Area.
Regional planning--Hudson River Valley (N.Y. and N.J.)
Regional planning--New York Metropolitan Area.
Harvard subject headings:
Princeton subject headings:
Environmental policy--Hudson river valley.
Environmental policy--New York metropolitan area.
Regional planning--Hudson River Valley.
Regional planning--New York metropolitan area.