@book{17387,
	author = {Winchell, Alexander Newton, and Winchell, N. H.},
	title = {Elements of optical mineralogy : },
	publisher = {J. Wiley & sons, inc.;},
	year = {c1939. },
	address = {New York : },
	edition = {2nd ed.},
	note = {"Part I of the first edition of this work was prepared chiefly by N.H. Winchell ... and parts II and III were prepared by Alexander N. Winchell ... The second edition was entirely rewritten and much enlarged by the present author."--Pref.}
}