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Journal Article Testing Statistical Significance of Geographic Variation Patterns Get access Robert R. Sokal Robert R. Sokal Department of Ecology and Evolution State University of New YorkStony Brook, New York 11794 Search for other works by this author on: Oxford Academic PubMed Google Scholar Systematic Biology, Volume 28, Issue 2, June 1979, Pages 227–232, https://doi.org/10.1093/sysbio/28.2.227a Published: 01 June 1979
Robert R. Sokal (Fri,) studied this question.