@book {,
	title = {Obsidian analyses and prehistoric Near Eastern Trade: 7500 to 3500 B.C.},
	year = {1969},
	note = {by Gary A. Wright.23 cm.},
	pages = {92},
	publisher = {University of Michigan},
	organization = {University of Michigan},
	address = {Ann Arbor},
	keywords = {Middle East Commerce., Obsidian Middle East., Stone age Middle East.},
	author = {Wright, Gary A.}
}