Johnson, C. B., and D. L. Garshelis. 1995. Sea otter abundance, distribution, and pup production in Prince William Sound, following the Exxon Valdez oil spill. Pages 894–929 in P. G. Wells, J. N. Butler, and J. S. Hughes (eds). Exxon Valdez oil spill: fate and effects in Alaskan waters. STP 1219, American Society for Testing and Materials, Philadelphia, PA.