@book{71044,
	author = {Berg, Herbert. and ebrary, Inc.},
	title = {Method and theory in the study of Islamic origins},
	publisher = {Brill,},
	year = {2003.},
	series = {Islamic history and civilization. Studies and texts,},
	address = {Leiden ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10089115}
}