Talk:Pennsylvania Geological Survey

External links modified (January 2018)
Hello fellow Wikipedians,

I have just modified one external link on Pennsylvania Geological Survey. 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://archive.is/20120707060707/http://apps.libraries.psu.edu/content/pageo.cfm to http://apps.libraries.psu.edu/content/pageo.cfm

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Cheers.— InternetArchiveBot  (Report bug) 18:44, 25 January 2018 (UTC)