TY  - RPRT
TI  - Toward a scientifically rigorous basis for developing mapped ecological regions.
AU  - G. McMahon
AU  - E.B. Wiken
AU  - D.A. Gauthier
PY  - 2004
DO  - 10.1007/s00267-004-0170-2
UR  - https://pubs.usgs.gov/publication/70026253
ID  - 70026253
ER  -