THE COMPOSITION OF HUMIC SUBSTANCES ISOLATED FROM MONGOLIAN BROWN COAL СтатьяMonkhzhargal Sh., Novikova L.N., Medvedeva S.A., Kushnarev D.F., Rokhin A.V., Dashitsyrenova A.D., Kalabin G.A.Solid Fuel Chemistry. Том 39. 2005. С. 11-17
