Ursus arctos isabellinus, Ursus arctos türüne bağlı bir ayı alttürüdür.[1][2]
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- "Status and Affinities of the Bears of Northeastern Asia", by Ernst Schwarz Journal of Mammalogy 1940 American Society of Mammalogists.
- Ogonev, S.I. 1932, "The mammals of eastern Europe and northern Asia", vol. 2, pp. 11–118. Moscow.
- Pocock R.I, "The Black and Brown Bears of Europe and Asia" Part 1. Journal of the Bombay Natural History Society., vol. 35, no. 4, pp. 772–823, figs 1-11. July 15, 1932.
- Ursus arctos, by Maria Pasitschniak, Published 23 April 1993 by "The American Society of Mammalogists"
- John A. Jackson, "More than Mountains", Chapter 10 (pp 92) & 11, "Prelude to the Snowman Expedition & The Snowman Expedition", George Harrap & Co, 1954
- Charles Stonor, "The Sherpa and the Snowman", recounts the 1955 Daily Mail "Abominable Snowman Expedition" by the scientific officer of the expedition, this is a very detailed analysis of not just the "Snowman" but the flora and fauna of the Himalaya and its people. Hollis and Carter, 1955.
- John A. Jackson, "Adventure Travels in the Himalaya" Chapter 17, "Everest and the Elusive Snowman", 1954 updated material, Indus Publishing Company, 2005.
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