User talk:John Zahm

November 2018
Hello, I'm Jackfork. I noticed that you made one or more changes to an article, Viscosity, 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. Jackfork (talk) 14:22, 6 November 2018 (UTC)