Columbia subject headings:
Death Valley National Park (Calif. and Nev.)--Boundaries.
Deserts--Law and legislation--California.
Joshua Tree National Park (Calif.)--Boundaries.
National parks and reserves--Law and legislation--California.
Wilderness areas--Law and legislation--California.
Harvard subject headings:
California Desert National Conservation Area (Calif.)
Death Valley National Park (Calif. and Nev.)
Deserts--Law and legislation--California.
Joshua Tree National Park (Calif.)
Mojave Desert (Calif.)
Public lands--California.
Wilderness areas--Law and legislation--California.
Princeton subject headings: