Journal Article Citation Analysis Get access Carl W. Schaefer, Carl W. Schaefer Systematic & Evolutionary Biology, University of Connecticut, Storrs, CT 06268 Search for other works by this author on: Oxford Academic Google Scholar Keith E. Roe Keith E. Roe Life Sciences Library, Pennsylvania State University, University Park, PA 16802 Search for other works by this author on: Oxford Academic Google Scholar BioScience, Volume 27, Issue 7, July 1977, Pages 442–443, https://doi.org/10.2307/1297522 Published: 01 July 1977
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