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This research is Contribution No. 545 from the Department of Biological Sciences, Northern Illinois University.
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Zar, J.H. Two-sample and multisample testing of circular data. Behavior Research Methods & Instrumentation 8, 329–330 (1976). https://doi.org/10.3758/BF03201734
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DOI: https://doi.org/10.3758/BF03201734