@book{26070,
	author = {Ries, Heinrich, and Somers, Ransom Evarts,},
	title = {The clays and shales of Virginia west of the Blue ridge,},
	publisher = {University of Virginia,},
	year = {1920.},
	series = {Virginia.  Geological survey.  Bulletin},
	address = {Charlottesville,},
	note = {At head of title: Virginia Geological survey.  University of Virginia.  Thomas Leonard Watson, director.}
}