SPECTROSCOPIC AND CHEMICAL EVALUATION OF CLAY MINERALS AND THEIR SUITABILITY FOR THE MANUFACTURING OF ORGANIC CLAY, MEDICINAL CLAY AND PILLARED CLAY. Pakistan Journal of Scientific & Industrial Research [Internet]. 2004 Dec. 27 [cited 2026 Mar. 10];47(6):407-16. Available from: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1561