thy, M., and Garcia, R., 2004, "Screw Threads on the SS <i>Xantho</i>: A Case of Standardisation in 19th Century Britain". <i>The International Journal of Nautical Archaeology</i>, 33. (1): 54–66.</span></li>
<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">The table here illustrates the differences between the old and new hexagon standards: <a rel="nofollow" class="external free" href="http://www.oldengine.org/members/diesel/Tables