Rao Liaqat A. K., Ansari Ziaur Rehman, and Yusuf Alia. ā€œPā€. International Journal of Research in Chemistry and Environment (IJRCE) 1, no. 2 (September 30, 2011): 36–45. Accessed October 23, 2026. https://www.ijrce.org/index.php/ijrce/article/view/81.