TY JOUR TI Use of limestone of the Republic of Bashkortostan in production of cement KW Portland cement KW composition of clinker KW limestone additive KW fineness of grinding KW strength of cement JO Technique and technology of silicates AU Usmanova, L.Z. AU Usmanova, D.Z. PY 2016 IS 23 PB Individual Entrepreneur Svetlana Vasilievna Samchenko