Talk:History of structural engineering

External links modified
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I have just modified one external link on History of structural engineering. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added archive https://web.archive.org/web/19970606074441/http://www.mos.org/leonardo/inventor.html to http://www.mos.org/leonardo/inventor.html

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Cheers.— InternetArchiveBot  (Report bug) 05:52, 5 November 2017 (UTC)