存档副本. [2007-04-19]. (原始内容存档于2007-09-27). here與http://www.geotimes.org/jan06/feature_threedinofaces.html (页面存档备份,存于互联网档案馆) here
clarku.edu
aleph0.clarku.edu
Huxley, T. H., 1870: Further Evidence of the Affinity between the Dinosaurian Reptiles and Birds Quarterly Journal of the Geological Society, Scientific Memoirs III [1] (页面存档备份,存于互联网档案馆)
web.archive.org
存档副本. [2007-04-19]. (原始内容存档于2007-09-27). here與http://www.geotimes.org/jan06/feature_threedinofaces.html (页面存档备份,存于互联网档案馆) here
Huxley, T. H., 1870: Further Evidence of the Affinity between the Dinosaurian Reptiles and Birds Quarterly Journal of the Geological Society, Scientific Memoirs III [1] (页面存档备份,存于互联网档案馆)