Attah, L. and Regasa, M. 2013. Assessment of heavy metals, pH and EC in effluent run-off, river and adjacent soil around a floriculture industry in Holeta, Wadera district, Ethiopia. Ethiopian Journal of Environmental Studies and Management. 6, 6 (Nov. 2013), 620–629. DOI:https://doi.org/10.4314/ejesm.v6i6.5.