@book{1546,
	author = {Clark, William C.,},
	title = {Sustainable development of the biosphere /},
	publisher = {Cambridge University Press,},
	year = {1986.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Errata slip inserted.},
	url = {http://www.loc.gov/catdir/description/cam032/86012996.html}
}