Formerly or currently considered subspecies or populations of brown bears have been listed as follows:[1][2]
- ^ Wozencraft, W. C. (2005). "Ursus arctos". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 588–589. ISBN 978-0-8018-8221-0. OCLC 62265494.
- ^ Ursus arctos, ITIS
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