@book{81790,
	author = {Young, M. J. L.},
	title = {Religion, learning, and science in the ʻAbbasid period /},
	publisher = {Cambridge University Press,},
	year = {1990.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/description/cam024/90001549.html}
}