User talk:90.129.197.216

December 2022
Hello, I'm Hrodvarsson. I noticed that you added or changed content in an article, Philipp Lenard, 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. You can have a look at referencing for beginners. If you think I made a mistake, you can leave me a message on my talk page. Thank you. Hrodvarsson (talk) 17:59, 11 December 2022 (UTC)