@book{139030,
	author = {King, David A. and ebrary, Inc.},
	title = {Instruments of mass calculation (studies X-XVIII)},
	publisher = {Brill,},
	year = {2005.},
	series = {Islamic philosophy, theology, and science,},
	address = {Leiden ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10171595}
}