Columbia subject headings:
Environmental policy--Indiana--Indiana Dunes National Park.
Indiana Dunes National Park (Ind.)
Land use--Indiana--Indiana Dunes National Park.
National parks and reserves--United States--History.
Nature conservation--Indiana--Indiana Dunes National Park.
Harvard subject headings:
Environmental policy--Indiana--Indiana Dunes National Park.
Indiana Dunes National Park (Ind.)
Land use--Indiana--Indiana Dunes National Park.
National parks and reserves--United States--History
Nature conservation--Indiana--Indiana Dunes National Park.
Princeton subject headings:
Environmental policy--Indiana--Indiana Dunes National Lakeshore.
Indiana Dunes National Park (Ind.)
Land use--Indiana--Indiana Dunes National Lakeshore.
National parks and reserves--United States--History.
Nature conservation--Indiana--Indiana Dunes National Lakeshore.