@conference {11811,
	title = {Tourism in National Parks -- Cycles of Myth and Behavior},
	booktitle = {2nd Conference on Scientific Research in the National Parks},
	year = {1979},
	month = {November 26-30},
	pages = {180},
	publisher = {University of Idaho},
	organization = {University of Idaho},
	keywords = {Conservation, Economy, Recreation management},
	author = {Machlis, Gary E and Burch, William R}
}
