Journal Article Principles of Animal Taxonomy Get access Principles of Animal Taxonomy . Simpson George Gaylord . 247 p., 30 diagrams. Columbia University Press . ( 1961 ) $6.00 . Richard E. Blackwelder Richard E. Blackwelder Southern Illinois University . Search for other works by this author on: Oxford Academic Google Scholar AIBS Bulletin, Volume 11, Issue 6, December 1961, Page 34, https://doi.org/10.2307/1292929 Published: 01 December 1961
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BLACKWELDER et al. (1961) studied this question.