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