Peter B. Pearman, Mike R. Penskar, Edward H. Schools, and Helen D. Endander. 2006. Identifying potential indicators of conservation value using Natural Heritage occurrence data. Ecological Applications 16:186–201.

Appendix D. A map of Michigan’s unchanged land cover ca. 1980 (Comer et al. 1995) .

LITERATURE CITED

Comer, P. J., D. A. Albert, H. A. Wells, B. L. Hart, J. B. Raab, D. L. Price, D. M. Kashian, R. A. Corner, and D. W. Schuen. 1995. Michigan's Native Landscape as Interpreted from the General Land Office Surveys 1816–1856. Report 1995-07.  Michigan Natural Features Inventory, Lansing, Michigan, USA.