S, Hugo Alberto, Raul Cortes-Martinez, and Ruth Alfaro-Cuevas-Villanueva. 2013. “Fluoride Removal from Aqueous Solutions by Mechanically Modified Guava Seeds”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 11 (1): 159-72. https://gssrr.org/JournalOfBasicAndApplied/article/view/1326.