@book{19783,
	author = {Worsley, Peter,},
	title = {The three worlds :},
	publisher = {University of Chicago Press,},
	year = {1984.},
	address = {Chicago :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0608/84002609-d.html}
}