@book {6807,
	title = {Man \& Nature in the National Parks; Reflections on Policy},
	year = {1969},
	publisher = {Conservation Foundation},
	organization = {Conservation Foundation},
	edition = {2nd ed.},
	address = {Washington, D.C.},
	keywords = {Conservation -- Government regulations, National Park Service},
	author = {Darling, F. Fraser and Eichhorn, Noel D}
}
