User talk:171.77.157.44

December 2017
Hello, I'm Jim1138. I noticed that you made a change to an article, Gypsum, but you didn't provide a source. I’ve removed it for now, but if you’d like to include a citation to a reliable source and re-add it, please do so! If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. Jim1138 (talk) 08:52, 27 December 2017 (UTC)