@book{149802,
	author = {Urton, Gary, and ebrary, Inc.},
	title = {Signs of the Inka Khipu},
	publisher = {University of Texas Press,},
	year = {2003.},
	series = {The Linda Schele series in Maya and pre-Columbian studies},
	address = {Austin :},
	edition = {1st ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10245782}
}