1. Raw materials;Meade,1926
2. Raw materials: Geological characteristics, nomenclature, origin, occurrences and exploration;Ghosh,1983
3. Chemico-Physico-Mineralogical characteristics of raw materials of Portland cement;Chatterjee,1983
4. The chemistry of Portland cement manufacture;Taylor,1997
5. Limestones and dolomite;Pettijohn,1975