@book{15647,
	author = {Stumpf, Samuel Enoch,},
	title = {Philosophical problems :},
	publisher = {McGraw-Hill,},
	year = {c1994.},
	address = {New York :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/description/mh022/93029947.html}
}