Zenkov D.A. Manual of Mining Geology Methodology for Gold Deposits. Part 1. Mining Exploration Sampling at Gold Mines. In Russian/Zenkov D.A. Rukovodstvo po metodike rudnichnoy geologii dlya zolotorudnykh mestorozhdeniy. Chast 1. Gornoeksploatatsionnoe oprobovanie na zolotykh rudnikakh. M. Gosgeolizdat. 1941 212 p. Please contact us for details on condition of available copies of the book. SKUalb3a8e707800120fdb