<dl><dd><b>Title page</b></dd></dl>
<a href="//commons.wikimedia.org/wiki/User:Andy_Dingley" title="User:Andy Dingley">Andy Dingley</a> (scanner)
1931
Scan from <cite class="book" style="font-style:normal">Harry Golding , ed.  (1931) <i> The Wonder Book of Engineering Wonders</i> (2<sup>nd</sup> ed.), <a href="https://en.wikipedia.org/wiki/en:London" class="extiw" title="w:en:London"><span title="capital and largest city of the United Kingdom">London</span></a>:  Ward, Lock &amp; Co.  <small></small></cite>