Attah, L. E., and Melkamu Biyana. 2013. “GC-MS Determination of Pesticide Residues in Effluent Run-Off, River and Adjacent Soil Around a Floriculture Industry in Holetta Town, Ethiopia”. Journal of Science and Sustainable Development 1 (2):25-40. https://doi.org/10.20372/au.jssd.1.2.2013.015.