@inbook {,
	title = {Obsidian and Prehistoric Sociocultural Systems in California},
	booktitle = {Exploring the Limits: Frontiers and Boundaries in Prehistory},
	volume = {223},
	year = {1984},
	pages = {153-},
	address = {Oxford},
	author = {Hughes, Richard E. and Bettinger, Robert L.},
	editor = {DeAtley, Suzanne P. and Findlow, Frank J.}
}