Gapeev, A. A. Geological sketch of the western edge of the Donetsk basin. In Russian/Gapeev, A. A. Geologicheskiy ocherk zapadnoy okrainy Donetskogo basseyna. With 1 map and 10 tables. Leningrad Geological Committee, Graphic workshops, 1927. 96 p. Please contact us for details on condition of available copies of the book. SKUalb8fc1391eedc7b9b5