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http://site.ebrary.com/id/10384021
http://www.myilibrary.com?id=255494
http://www.netlibrary.com/urlapi.asp?action=summary&v=1&bookid=318250
http://public.eblib.com/EBLPublic/PublicView.do?ptiID=516939
http://www.myilibrary.com?id=255494&ref=toc
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