Key points are not available for this paper at this time.
Simpson, George Gaylord. The Principles of Classification and a Classification op Mammals. Bull. Amer. Mus. Nat. Hist.> vol. 85, pp. xvi + 350, October 5,1945. Simpson George Gaylord. The Principles of Classification and a Classification op Mammals. Bull. Amer. Mus. Nat. Hist. vol. 85, pp. xvi + 350, October 5, 1945. E. Raymond Hall E. Raymond Hall Search for other works by this author on: Oxford Academic Google Scholar Journal of Mammalogy, Volume 27, Issue 3, 14 August 1946, Pages 287–288, https://doi.org/10.2307/1375443 Published: 14 August 1946
Hall et al. (Thu,) studied this question.