nd leads to marine mammals and birds". Journal of Marine Systems. 10 (1–4): 9–21. doi:10.1016/S0924-7963(96)00054-1.↑ Davids, Richard C. (1982). "Lords of the Arctic". Lords of the Arctic: A Journey Among the Polar Bears. New York: MacMillan Publishing Co., Inc. ISBN 0-02-529630-2. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)↑ 31.0 31.1 Hemstock, p. 4↑ Wood, G.L. (1983). The Guinness Book of Animal Records. p. 240. ISBN 978-0-85112-235-9.↑ Polar bear Ursus maritimus - Appearance/Morphology: Measurement and Weight (Literature Reports) සංරක්ෂණය කළ පිටපත 2011-09-30 at the Wayback Machine. Wildlife1.wildlifeinformation.org. Retrieved 15 September 2011.↑ 34.0 34.1 34.2 34.3 Stirling, Ian (1988). Polar Bears. Ann Arbor: University of Michigan Press. ISBN 0-472-10100-5.↑ Kolenosky G. B. 1987. Polar bear. pp. 475–485 in Wild furbearer management and conservation in North America (M. Novak, J. A. Baker, M. E. Obbard, and B. Malloch, eds.). Ontario