User talk:Nazin rahman

Please do not introduce incorrect information into articles. Your edits could be interpreted as vandalism and have been reverted. If you believe the information you added was correct, please cite references or sources or discuss the changes on the article's talk page before making them again. If you would like to experiment, use the sandbox. Thank you. Materialscientist (talk) 07:21, 25 April 2016 (UTC)