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D. W. Hagstrum, J. C. Webb, K. W. Vick, Acoustical Detection and Estimation of Rhyzopertha dominica (F.) Larval Populations in Stored Wheat, The Florida Entomologist, Vol. 71, No. 4 (Dec., 1988), pp. 441-447
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Hagstrum et al. (1988) studied this question.
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