Book
Hotton III, N., MacLean, P.D., Roth, J.J. & Roth, E.C.
1986. The Ecology and Biology of Mammal-like Reptiles. Smithsonian Institute Press, Washington, DC: i-x, 1-326.
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Articles
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Hopson, J.A. & Barghusen, H.R., 1986.
An Analysis of Therapsid Relationships: 83-106.