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Jack R. Layne, Jr., Richard E. Lee, Jr., Michele M. Cutwa, Post-Hibernation Excretion of Glucose in Urine of the Freeze Tolerant Frog Rana sylvatica, Journal of Herpetology, Vol. 30, No. 1 (Mar., 1996), pp. 85-87
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Layne et al. (1996) studied this question.
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