User talk:61.19.26.170

Hello, I'm Materialscientist. I noticed that you made a change to an article, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you. Materialscientist (talk) 04:30, 13 February 2015 (UTC)

February 2020
Hello, I'm Serols. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Koh-i-Noor—because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help desk. Thanks. Serols (talk) 16:34, 9 February 2020 (UTC)
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