@book{130704,
	author = {Hempel, Carl G. and Fetzer, James H.,},
	title = {The philosophy of Carl G. Hempel :},
	publisher = {Oxford University Press,},
	year = {2001.},
	address = {Oxford ;},
	url = {http://www.loc.gov/catdir/enhancements/fy0603/99087203-d.html}
}