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Ellis, P., M. Hall, H. Kim, E. King, J. Miklos, G. Prins, D. Schmidt, A. Wells, and T. Winfield, The impact of the Canada Goose population at Columbia Lake: A sustainability study, 1998.
Campbell, C., J. Bocking, A. Mount, L. Daar, and R. Koehler, Searching for a sustainable method for controlling geese populations, 1998.