@misc{indiciae59792dfbfab3, title = {Toward a scientifically rigorous basis for developing mapped ecological regions.}, author = {G. McMahon and E.B. Wiken and D.A. Gauthier}, year = {2004}, doi = {10.1007/s00267-004-0170-2}, url = {https://pubs.usgs.gov/publication/70026253}, note = {Source identifier: 70026253} }