Reference: Dollo, L. (1906). Les dinosauriens adaptes a la vie quadrupede secondaire. Mem. Soc. belge Geol. XIX 441-448
Article scanned as part of the Dinosaur Digital Library Project, a for-research-only resource since 2004.
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This scan by D. W. Fowler.
Originally published 1906. Since this is pre-1923, the article is now in the public domain (out of copyright): http://en.wikipedia.org/wiki/US_copyright If for any reason this is not the case, this file can be removed.