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		Korean Journal of Environment and Ecology :: Vol.28 No.5 pp.516-522 DOI:https://doi.org/10.13047/KJEE.2014.28.5.516 Open abstract    
Korean Journal of Environment and Ecology :: Vol.28 No.5 pp.516-522
			DOI:https://doi.org/10.13047/KJEE.2014.28.5.516
			 
			