Dinosaur Coprolites and the Early Evolution of Grasses and Grazers.
Prasad, Vandana 1; Stromberg, Caroline A. E. 2*; Alimohammadian, Habib 3; Sahni, Ashok 3
[Report] Science. Materials and Biology. 310(5751):1177-1180, November 18, 2005.

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