Issa, H.M. 2018. Long-term Evaluation of Temporal Variation in Groundwater Physicochemical Quality: A Case Study of Erbil City, Iraq (2003 – 2015). EURASIAN JOURNAL OF SCIENCE AND ENGINEERING. 4, 1 (Sep. 2018), 32–48. DOI:https://doi.org/10.23918/eajse.v4i1sip32.