@article {,
	title = {Determining the Geological Provenance of Obsidian Artifacts from the Maya Region: A test of the efficacy of visual sourcing},
	journal = {Latin American Antiquity},
	volume = {11},
	number = {3},
	year = {2000},
	pages = {269-282},
	author = {Braswell, Geoffrey E. and Clark, John E. and Aoyama, Kazuo and McKillop, Heather I. and Michael D. Glascock}
}