ON THICKNESS DECREASE OF PARENT SUBSTANCE OF COAL.ZARITSKY PV; ZARITSKIJ PV.1975; IN: 7. CONGR. INT. STRATIGR. GEOL CARBONIFERE; C.R.; KREFELD; 1971; KREFELD GEOL. LANDESAMT NORDRHEIN-WESTFALEN,1975, VOL. 4, P. 393 A 397Miscellaneous

FEATURES OF MINERALOGY AND GEOCHEMISTRY OF MANGANESE IN DIAGENESIS OF TERRIGENOUS COAL-BEARING DEPOSITSZARITSKY PV; ZARITSKIJ PV.1980; CONGRES GEOLOGIQUE INTERNATIONAL. 26/1980/PARIS; FRA; ORLEANS: B.R.G.M.; DA. 1980; VOL. 3; PP. 1037Conference Paper