Issa, Hayder Mohammed. 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): 32-48. https://doi.org/10.23918/eajse.v4i1sip32.