@article {72351,
	title = {The Quartz Crystal Deposits of Western Arkansas},
	journal = {Economic Geology},
	volume = {41},
	year = {1946},
	note = {Ouachita Mountains; Paleozoic},
	pages = {598-618},
	keywords = {Arkansas, minerals, Paleozoic},
	author = {Engel, A. E. J.}
}
