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2. Ceramic Raw Materials;Bolewski,1991
3. 2001 Methods of Test for Masonry Units-Part 13: Determination of the Density of the Net and Gross Density of Masonry in the Dry State (Except for Natural Stone),2001
4. 2011a E Methods of Test for Masonry Units. Part 21: Determination of Water Absorption of Ceramic and Silicate Masonry Elements by Cold Water Absorption,2010