Barghouthi, Z., Amereih, .S. and Khayat, S. 2013. Spectrophotometric Determination of Fluoride in Groundwater Using Complexes of Flavonoid Chrysin. Palestine Technical University Research Journal. 1, 1 (Aug. 2013), 16–20. DOI:https://doi.org/10.53671/pturj.v1i1.8.