@article {,
	title = {The Obsidian Mines of Hidalgo, Mexico},
	journal = {American anthropologist},
	volume = {2},
	year = {1900},
	note = {Pachuca source, "Sierra de las Navajas".sketches of some pits and the polyhedral cores from blade production},
	pages = {405-416},
	publisher = {New York, 1900},
	keywords = {Mexico--Archaeology, Mexico--Archaeology--Hidalgo, Mexico--Archaeology--Obsidian, Mexico--Archaeology--Quarries},
	author = {Holmes, William Henry}
}