[1]
Victoriano R. Ragasa and Ronald Amano 1998. The Manufacture of Tiles (l/4"x4"x4") Using Vigan Clay, Silica, and Ball Clay. The Vector: International Journal of Emerging Science, Technology and Management (IJESTM). 7, 1 (Dec. 1998). DOI:https://doi.org/10.69566/ijestm.v7i1.123.