Alwan Saleh, Fouad, and Ahmed Kadhim Hussein. 2006. “Numerical Investigation of Heat and Mass Transfer through the Preheater System in CementManufacturing Plant”. Journal of Engineering and Sustainable Development 10 (4): 78-100. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1774.