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		Korean Journal of Environment and Ecology :: Vol.31 No.4 pp.397-408 DOI:https://doi.org/10.13047/KJEE.2017.31.4.397 Open abstract    
Korean Journal of Environment and Ecology :: Vol.31 No.4 pp.397-408
			DOI:https://doi.org/10.13047/KJEE.2017.31.4.397
			 
			