Talk:Harbison-Walker Refractories Company

External links modified
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 * Added archive https://web.archive.org/web/20140222175352/http://www.carnegielibrary.org/research/business/pghannualreports.html to http://www.carnegielibrary.org/research/business/pghannualreports.html

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Cheers.— InternetArchiveBot  (Report bug) 02:29, 30 October 2017 (UTC)