User talk:Karl1987

Please do not add or change content without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. Materialscientist (talk) 01:17, 12 May 2020 (UTC)

May 2020
Please stop your disruptive editing. If you continue to vandalize Wikipedia, as you did with this edit to Jermyn, Pennsylvania, you may be blocked from editing. Materialscientist (talk) 01:52, 12 May 2020 (UTC)