published by Damascus University in 2011 in Geotechnical Engineering and research's language is العربية Download

ASTM C373-88, Standard Test Method for Water Absorption, Bulk Density, Apparent Porosity, and Apparent Specific Gravity of Fired Whiteware Products

ASTM C1327-03, Standard test method for Vicker Indentaion Hardness of Advanced Ceramic

Burst, J.F., 1991. The application of clay minerals in ceramics. Applied Clay Science 5 (5–6), 421–443