PT Journal AU Al-Omran, AM Aly, AA Al-Wabel, MI Al-Shayaa, MS Sallam, AS Nadeem, ME TI Geostatistical methods in evaluating spatial variability of groundwater quality in Al-Kharj Region, Saudi Arabia SO Appl. Water Sci. PY 2017 BP 4013 EP 4023 VL 7 DI 10.1007/s13201-017-0552-2 ER