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Hello, Tom2K, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few links to pages you might find helpful:

Please remember to sign your messages on talk pages by typing four tildes (~~~~); this will automatically insert your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question on this page and then place {{help me}} before the question. Again, welcome! Vsmith (talk) 14:33, 21 October 2013 (UTC)Reply

I've removed your citation needed bit from titanium dioxide and explained on talk. Seems to have been a simple mis-reading. Let me know if I've misunderstood your comment on the talk page there. Vsmith (talk) 14:33, 21 October 2013 (UTC)Reply