D. M.  Stoms, Kuhn, W. A., Davis, F. W., and pp Final Report to the Environmental Protection Agency, C. A., ?Acquisition and Evaluation of Data Sets for Comparative Assessment of Risk to Biodiversity on a Continental Scale: Threats to Biodiversity?. University of California, Santa Barbara, 1998.

D. M.  Stoms, Kuhn, W. A., Davis, F. W., and pp Final Report to the Environmental Protection Agency, C. A., ?Acquisition and Evaluation of Data Sets for Comparative Assessment of Risk to Biodiversity on a Continental Scale: Threats to Biodiversity?, University of California, Santa Barbara, 1998.