[Determination of free silicon dioxide in dust and rocks by weight and colorimetric methods].
D003124:Colorimetry; D004391:Dust; D012822:Silicon Dioxide / Q000032:analysis*; D012987:Soil; D014586:USSR
D004391:Dust; D012987:Soil; D012822:Silicon Dioxide
Opredelenie svobodnoĭ dvuokisi kremniia v pyli n gornykh porodakh vesovym i kolorimetricheskim sposobom.