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News from Online-Smithsonian's Dig It! Web Site Shows That Soil Is Not a Dirty, Four-Letter Word

Megonigal, J. Patrick ; Megonigal, E. J. (2010). News from Online-Smithsonian's Dig It! Web Site Shows That Soil Is Not a Dirty, Four-Letter Word . Journal of chemical education, 87 (2) , 133-134. http://dx.doi.org/10.1021/ed8000667