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Bruce K. Johnson, James L. Christiansen, The Food and Food Habits of Blanchard's Cricket Frog, Acris crepitans blanchardi (Amphibia, Anura, Hylidae), in Iowa, Journal of Herpetology, Vol. 10, No. 2 (Apr. 26, 1976), pp. 63-74
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Johnson et al. (1976) studied this question.
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