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1by Cohen, Denis, Iverson, Neal R., Hooyer, T. S., Fischer, U. H., Jackson, M., Moore, Peter Lindsay“...Iowa State University Digital Repository...”
Published 2005
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2by Iverson, Neal R., Hooyer, Thomas S., Fischer, Urs H., Cohen, Denis, Moore, Peter L., Jackson, M., Lappegard, G., Kohler, J.“...Iowa State University Digital Repository...”
Published 2007
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