Korashy, S. E. “?HYDROTHERMAL CRYSTALLIZATION AND CRYSTAL GROWTH OF a-Si02 FROM RICE HUSK SILICA ASH IN ALKALINE SOLUTIONS”. Biological Sciences - PJSIR, vol. 41, no. 6, Dec. 1998, pp. 312-7, https://v2.pjsir.org/index.php/biological-sciences/article/view/2300.