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Cordingley JE, Newton AC, Rose RJ, Clarke RT, Bullock JM.Cordingley JE, et al. Among authors: clarke rt.PLoS One. 2015 Jun 26;10(6):e0130004. doi: 10.1371/journal.pone.0130004. eCollection 2015.PLoS One. 2015.PMID: 26114753Free PMC article.
Smart SM, Clarke RT, van de Poll HM, Robertson EJ, Shield ER, Bunce RG, Maskell LC.Smart SM, et al. Among authors: clarke rt.J Environ Manage. 2003 Mar;67(3):239-54. doi: 10.1016/s0301-4797(02)00177-9.J Environ Manage. 2003.PMID: 12667474
Howard DC, Watkins JW, Clarke RT, Barnett CL, Stark GJ.Howard DC, et al. Among authors: clarke rt.J Environ Manage. 2003 Mar;67(3):219-27. doi: 10.1016/s0301-4797(02)00175-5.J Environ Manage. 2003.PMID: 12667472