User talk:2601:1C0:7000:C70:2939:1D37:5715:BC3F

July 2021
Hello, I'm HelenDegenerate. I noticed that you added or changed content in an article, Melvin Calvin, 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. Helen (💬📖) 03:09, 16 July 2021 (UTC)