Talk:Ion Exchange Letters

External links modified (January 2018)
Hello fellow Wikipedians,

I have just modified one external link on Ion Exchange Letters. 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/20090630072437/http://www.doaj.org/doaj?func=openurl&issn=18034039&genre=journal to http://www.doaj.org/doaj?func=openurl&issn=18034039&genre=journal

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Cheers.— InternetArchiveBot  (Report bug) 18:59, 29 January 2018 (UTC)