@book{30001,
	author = {Edington, John M. and Edington, M. Ann.},
	title = {Ecology, recreation, and tourism /},
	publisher = {Cambridge University Press,},
	year = {1986.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/cam032/85030944.html}
}