Talk:Demographic gravitation

External links modified
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I have just modified one external link on Demographic gravitation. 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/20070610011209/http://libweb.princeton.edu/libraries/firestone/rbsc/aids/stewart-john.html to http://libweb.princeton.edu/libraries/firestone/rbsc/aids/stewart-john.html

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Cheers.— InternetArchiveBot  (Report bug) 13:34, 8 September 2017 (UTC)