Photograph of the skeletal mount of Allosaurus specimen AMNH 5753, from William Diller Matthew's 1915 Dinosaurs (there attributed to <a href="//commons.wikimedia.org/wiki/Henry_Fairfield_Osborn" title="Henry Fairfield Osborn">Henry Fairfield Osborn</a>). This particular version is taken from the Project Gutenberg e-book.
William Diller Matthew (Uploader to <a href="https://en.wikipedia.org/wiki/" class="extiw" title="en:">en.Wikipedia</a> was <a href="https://en.wikipedia.org/wiki/User:J._Spencer" class="extiw" title="en:User:J. Spencer">J. Spencer</a>)
Originally taken in 1915. Uploaded to en.Wikipedia at 2007-12-09.
<p>Moved from english Wikipedia <a href="https://en.wikipedia.org/wiki/Image:AllosaurusAMNH5753.jpg" class="extiw" title="en:Image:AllosaurusAMNH5753.jpg">en:Image:AllosaurusAMNH5753.jpg</a>.<br><b>Original Source</b>
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<ul><li>Matthew, William D. (1915) <i><a rel="nofollow" class="external text" href="http://www.gutenberg.org/files/19302/19302-h/19302-h.htm">Dinosaurs, with Special Reference to the American Museum Collections</a></i>. New York:American Museum of Natural History.</li></ul>