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Polar Bear ( Ursus maritimus ) Fact Sheet: Taxonomy & History
ADW: Ursus maritimus: CLASSIFICATION
Polar bear - Wikipedia
Polar bear | Description, Habitat, & Facts | Britannica
All About Polar Bears - Scientific Classification | United Parks
Polar Bear Fact Sheet | Blog | Nature - PBS
Polar Bear - A-Z Animals
Polar Bear (Ursus maritimus) | U.S. Fish & Wildlife Service
Ursus maritimus (Polar bear) - International Association for Bear ...
Bears of the Last Frontier | Polar Bear Fact Sheet - PBS