THE COMPOSITION OF HUMIC SUBSTANCES ISOLATED FROM MONGOLIAN BROWN COAL ArticleMonkhzhargal 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
