Dennis G. Raveling, James D. Nichols, James E. Hines, David S. Zezulak, Joseph G. Silveira, James C. Johnson, Thomas W. Aldrich, John A. Weldon, Survival of Cackling Canada Geese, 1982-1988, The Journal of Wildlife Management, Vol. 56, No. 1 (Jan., 1992), pp. 63-73
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