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M. E. Solomon, D. M. Glen, D. A. Kendall, N. F. Milsom, Predation of Overwintering Larvae of Codling Moth (Cydia pomonella (L.)) by Birds, Journal of Applied Ecology, Vol. 13, No. 2 (Aug., 1976), pp. 341-352
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Solomon et al. (1976) studied this question.
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