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Hilker T, Coops NC, Wulder MA, Black TA, Guy RD.Hilker T, et al. Among authors: coops nc.Sci Total Environ. 2008 Oct 15;404(2-3):411-23. doi: 10.1016/j.scitotenv.2007.11.007. Epub 2007 Dec 11.Sci Total Environ. 2008.PMID: 18063011Review.
Soverel NO, Coops NC, White JC, Wulder MA.Soverel NO, et al. Among authors: coops nc.Environ Monit Assess. 2010 May;164(1-4):481-99. doi: 10.1007/s10661-009-0908-7. Epub 2009 May 5.Environ Monit Assess. 2010.PMID: 19415515