Hickey, D., Opitz, R., & Gazis, C. (2010). Geochemical analysis of surface and ground waters around Cle Elum, WA: Implications for the proposed exempt well moratorium. Pacific Northwest Journal of Undergraduate Research and Creative Activities, Volume 1, Article 3
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From "Geochemical Analysis of Surface and Ground Waters around Cle Elum, WA: Implications for the Proposed Exempt Well Moratorium"