Choren, Eduardo, Alexander Moronta, Lenin Huerta, and Alfredo Meyer. 1. “Comparative Study Among a Venezuelan Clay, Its Modifications, and Commercial Clays”. Revista Técnica De La Facultad De Ingeniería. Universidad Del Zulia 19 (2). https://www.produccioncientificaluz.org/index.php/tecnica/article/view/5505.