R.L. Powell M.K. Nelson S.J. Klaine M.G. Henry G.W. Dickson Michael A. Lewis F.L. Mayer R.L. Powell M.K. Nelson S.J. Klaine M.G. Henry G.W. Dickson F.L. Mayer 1999 application/pdf en Society of Environmental Toxicology and Chemistry Ecotoxicology and risk assessment for wetlands: proceedings from the SETAC Pellston Workshop on Ecotoxicology and Risk Assessment for Wetlands, 30 July-3 August 1995, Fairmont Hot Springs, Anaconda, Montana book