George A. Swanson, Gary L. Krapu, James C. Bartonek, Jerome R. Serie, Douglas H. Johnson, Advantages in Mathematically Weighting Waterfowl Food Habits Data, The Journal of Wildlife Management, Vol. 38, No. 2 (Apr., 1974), pp. 302-307
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Swanson et al. (1974) studied this question.
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