User talk:Rotreg

Welcome to Wikipedia. Everyone is welcome to contribute to the encyclopedia, but when you add or change content, as you did to the article CS gas, please cite a reliable source for the content of your edit. 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) 00:16, 1 February 2011 (UTC)

Please do not add or change content without verifying it by citing reliable sources, as you did to CS gas. Before making any potentially controversial edits, it is recommended that you discuss them first on the article's talk page. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. -- Gogo Dodo (talk) 00:32, 1 February 2011 (UTC)