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Hans Blokpoel, Gaston D. Tessier, R. A. (Bud) Andress, Successful Restoration of the Ice Island Common Tern Colony Requires On-Going Control of Ring-Billed Gulls, Colonial Waterbirds, Vol. 20, No. 1 (1997), pp. 98-101
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Blokpoel et al. (1997) studied this question.
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