User talk:189.217.69.191

September 2014
Hello, I'm Materialscientist. I wanted to let you know that I undid one or more of your recent contributions to National Autonomous University of Mexico because it did not appear constructive. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Materialscientist (talk) 08:35, 19 September 2014 (UTC)
 * If this is a shared IP address, and you did not make the edits, consider creating an account for yourself so you can avoid further irrelevant notices.