User talk:2.90.38.57

December 2011
Hello and welcome! I noticed you made a change to an article, but didn’t provide a source for your edit. I’ve removed it for now, but if you can include a citation to a reliable source and re-add it, please do so! Thank you, Jim1138 (talk) 10:22, 20 December 2011 (UTC)

Welcome to Wikipedia. Everyone is welcome to contribute to the encyclopedia, but when you add or change content, please cite a reliable source for your addition. This helps maintain our policy of verifiability. See Citing sources for how to cite sources, and the welcome page to learn more about contributing to this encyclopedia. Thank you. Materialscientist (talk) 10:41, 20 December 2011 (UTC)