Talk:Charles A. Gunn

External links modified
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I have just modified 1 one external link on Charles A. Gunn. 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/20120715054329/http://www.nps.gov/history/history/online_books/butowsky5/astro4h.htm to http://www.nps.gov/history/history/online_books/butowsky5/astro4h.htm

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Cheers.— InternetArchiveBot  (Report bug) 19:56, 19 November 2016 (UTC)