"1959g"--from sheet 1. At head of title: Laboratorii︠a︡ geologii ugli︠a︡ (Akademii︠a︡ nauk SSSR) Sheets individually numbered. "Karta uglenosn*kh provint︠s︡iĭ SSSR"--in lower or upper left margin of sheets. "Podpisano k pechati 4-1-1961g." "M-04504." Includes notes.