Jurgenson G. A. Typomorphism and the ore content of vein quartz. In Russian (ask us if in doubt)/Yurgenson G.A. Tipomorfizm i rudonosnost zhilnogo kvartsa. M. Nedra, 1984. 150 p. Please contact us for details on condition of available copies of the book. SKUalb06becc57a1b315f6