Science. 2002 May 31;296(5573):1659.
Sauropod trackways, evolution, and behavior.
Day JJ, Upchurch P, Norman DB, Gale AS, Powell HP.
Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK. jday00@esc.cam.ac.uk
PMID: 12040187 [PubMed - indexed for MEDLINE]
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