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1. World Wildlife Fund Ecoregions, 2000

1999. World Wildlife Fund and Environmental Systems Research Institute, Inc. (ESRI). World Wildlife Fund Ecoregions represents global terrestrial and freshwater ecoregions defined as relatively large areas of land or water in the wo... Environmental Systems Research Institute, Inc. (ESRI).

2. World Wildlife Fund Marine Ecoregions, 2001

2001. World Wildlife Fund. World Wildlife Fund Marine Ecoregions represents global marine ecoregions. Ecoregions are defined as relatively large areas of land or water in the... Esri.

3. World Wildlife Fund Marine Ecoregions 2008

2001. World Wildlife Fund. World Wildlife Fund Marine Ecoregions represents global marine ecoregions. Ecoregions are defined as relatively large areas of land or water in the... ESRI.

4. World Wildlife Fund Marine Ecoregions, 2008

2001. World Wildlife Fund and ESRI. World Wildlife Fund Marine Ecoregions is a polygon theme representing global marine ecoregions. Ecoregions are defined as relatively large areas of... ESRI.

5. World Wildlife Fund Marine Ecoregions, 2012

2001. World Wildlife Fund and Environmental Systems Research Institute (Redlands, Calif.). World Wildlife Fund Marine Ecoregions is a polygon theme representing global marine ecoregions. Ecoregions are defined as relatively large areas of... Esri.

6. World Wildlife Fund Terrestrial Ecoregions, 2005

2001. World Wildlife Fund. World Wildlife Fund Terrestrial Ecoregions represents global terrestrial ecoregions. Ecoregions are defined as relatively large areas of land or wa... Esri.

7. World Wildlife Fund Terrestrial Ecoregions, 2008

2008. World Wildlife Fund and ESRI. World Wildlife Fund Terrestrial Ecoregions is a polygon theme representing global terrestrial ecoregions. Ecoregions are defined as relatively larg... ESRI.

8. World Wildlife Fund Terrestrial Ecoregions 2008

2001. World Wildlife Fund. World Wildlife Fund Terrestrial Ecoregions represents global terrestrial ecoregions. Ecoregions are defined as relatively large areas of land or wa... ESRI.

9. World Wildlife Fund Terrestrial Ecoregions, 2012

2001. World Wildlife Fund and Environmental Systems Research Institute (Redlands, Calif.). World Wildlife Fund Terrestrial Ecoregions is a polygon theme representing global terrestrial ecoregions. Ecoregions are defined as relatively larg... Esri.