TY - RPRT TI - Effects of earlier sea ice breakup on survival and population size of polar bears in western Hudson Bay AU - E.V. Regehr AU - N.J. Lunn AU - Steven C. Amstrup AU - I. Stirling PY - 2010 DO - 10.2193/2006-180 UR - https://pubs.usgs.gov/publication/70031436 ID - 70031436 ER -