[Composition of the humus of manganous-ferrous new formations].
D000143:Acids / Q000032:analysis; D002244:Carbon / Q000032:analysis; D006812:Humic Substances / Q000032:analysis; D007501:Iron / Q000032:analysis; D008345:Manganese / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D012987:Soil / Q000032:analysis*; D013464:Sulfuric Acids / Q000032:analysis; D014586:USSR
D000143:Acids; D006812:Humic Substances; D012987:Soil; D013464:Sulfuric Acids; D008345:Manganese; D002244:Carbon; D007501:Iron; D009584:Nitrogen
O sostave gumusa margantsovisto-zhelezistykh novoobrazovaniĭ.