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	1.	No cover image available No cover image available No cover image available Life of the past : an introduction to paleontology by Simpson, George Gaylord ill Material type: Text; Format: print ; Literary form: Not fiction Publication details: New Haven ; Yale University ; 1953 Availability: No items available. Add to cart (remove)
	2.	No cover image available No cover image available No cover image available Principle of animal taxonomy by Simpson, George Gaylord ill Material type: Text; Format: print ; Literary form: Not fiction Publication details: New York ; Columbia University Press ; 1961 Availability: No items available. Add to cart (remove)
	3.	No cover image available No cover image available No cover image available The principle of classification and a classification of mammals by Simpson, George Gaylord ill Material type: Text; Format: print ; Literary form: Not fiction Publication details: New Tork ; American Museum of Natural History ; 1962 Availability: No items available. Add to cart (remove)
	4.	No cover image available No cover image available No cover image available Fossils and the history of life by Simpson, George Gaylord [Author] Material type: Text; Format: print ; Literary form: Not fiction Publication details: New York : W. H. Freeman and Company, 1983 Availability: Items available for loan: UDSM Library (1)Collection, call number: Science and Engineering Collection QE711.2.S55. Place hold Add to cart (remove)
	5.	No cover image available No cover image available No cover image available Tempo and mode in evolution by Simpson, George Gaylord [Author] Material type: Text; Format: print ; Literary form: Not fiction Publication details: New York: Hafner Publishing Company, 1965 Availability: Items available for loan: Directorate of Library Services (UDSM) (2)Collection, call number: Science and Engineering Collection QH366.S59, ... Place hold Add to cart (remove)
	6.	No cover image available No cover image available No cover image available Tempo and mode in evolution by Simpson, George Gaylord ill Material type: Text; Format: print ; Literary form: Not fiction Publication details: London ; Hafner Press ; 1965 Availability: No items available. Add to cart (remove)