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Wan Wiriya. (2008) Monitoring and analysis of atmospheric acid deposition in Chiang Mai, Thailand, year 2006-2007 . Chiang Mai University/Chiang Mai.
Wan Wiriya. Monitoring and analysis of atmospheric acid deposition in Chiang Mai, Thailand, year 2006-2007. . Chiang Mai:Chiang Mai University, 2008.
Wan Wiriya. (2008) Monitoring and analysis of atmospheric acid deposition in Chiang Mai, Thailand, year 2006-2007 . Chiang Mai University/Chiang Mai.