<a rel="nofollow" class="external text" href="http://www.library.usyd.edu.au/libraries/rare/bridge/introduction.html">University of Sydney Library's exhibition on the construction of the Sydney Harbour Bridge</a>.
In particular, the source of this image is <a rel="nofollow" class="external free" href="http://setis.library.usyd.edu.au/pubotbin/ebind2htmljpg/bradfield?seq=9">http://setis.library.usyd.edu.au/pubotbin/ebind2htmljpg/bradfield?seq=9</a>. Quoting from the page: "Some of the materials displayed here are from the personal collection of the chief engineer, Dr John Job Crew Bradfield, and are the gift of his son Dr Keith Noel Everal Bradfield. Others are from the collection of W.H. Lush, the designing engineer, and are the gift of Mrs B.M. Lush and Miss E. Lush."
<p><a rel="nofollow" class="external free" href="http://www.library.usyd.edu.au/libraries/rare/bridge/introduction.html">http://www.library.usyd.edu.au/libraries/rare/bridge/introduction.html</a> <br></p>
This image was uploaded by <a href="https://en.wikipedia.org/wiki/User:Enochlau" class="extiw" title="w:User:Enochlau">Enoch Lau</a>. As a courtesy, please let me know if you alter this image or this image description page.