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Louis-Paul Rivest, Francois Potvin, Helene Crepeau, Gaetan Daigle, Statistical Methods for Aerial Surveys Using the Double-Count Technique to Correct Visibility Bias, Biometrics, Vol. 51, No. 2 (Jun., 1995), pp. 461-470
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Rivest et al. (1995) studied this question.
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