Michelle E. Lander, James T. Harvey, Krista D. Hanni, Lance E. Morgan, Behavior, Movements, and Apparent Survival of Rehabilitated and Free-Ranging Harbor Seal Pups, The Journal of Wildlife Management, Vol. 66, No. 1 (Jan., 2002), pp. 19-28
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Lander et al. (2002) studied this question.
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