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* [[Robert L. Carroll|Carroll, R. L.]] (1988), ''Vertebrate Paleontology and Evolution'', WH Freeman & Co.
* [[Edwin H. Colbert|Colbert, E. H.]], (1969), ''Evolution of the Vertebrates'', John Wiley & Sons Inc (2nd ed.)
* [[Alfred Sherwood Romer|Romer, A. S.]], (1947, revised ed. 1966) Vertebrate Paleontology, University of Chicago Press, Chicago
* Romer, A. S. and [[Llewellyn Price|Price, L. I.]], (1940), ''Review of the Pelycosauria'', Geological Society of American Special Papers, No 28
 
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