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Graybill, DA. 1985. ?Proposed Contract With The Environmental Sciences Division, Oak Ridge, Tn. 37831 For Research On 'detection Of Forest Response To Increased Atmospheric Carbon Dioxide' 1985?. Tucson: Laboratory of Tree-Ring Research.\par \par Graybill, DA. 1984. ?Proposed Contract With The Environmental Sciences Division, Oak Ridge, Tn. 37831 For Research On 'detection Of Forest Response To Increased Atmospheric Carbon Dioxide' 1984?. Tucson: Laboratory of Tree-Ring Research.\par \par }