User talk:108.90.14.170

October 2021
Hello, I'm PerpetuityGrat. I noticed that you added or changed content in an article, Earth observation, 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. PerpetuityGrat (talk) 16:30, 28 October 2021 (UTC)