Source: http://www.edream.ma:8080/jspui/bitstream/123456789/1693/1/Caract%C3%A9ristiques%20structurales%20et%20m%C3%A9caniques%20de%20c%C3%A9ramiques%20%C3%A0%20base%20d%27argiles%20%20influence%20de%20la%20source%20de%20feldspath.pdf