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I. Scott, M. Grant, P. R. Evans, Estimation of Fat-Free Mass of Live Birds: Use of Total Body Electrical Conductivity (TOBEC) Measurements in Studies of Single Species in the Field, Functional Ecology, Vol. 5, No. 2, New Directions in Physiological Ecology (1991), pp. 314-320
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Scott et al. (1991) studied this question.
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