February 2021 edit
Hello, I'm DVdm. I noticed that you added or changed content in an article, Field line, 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 the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. - DVdm (talk) 17:05, 1 February 2021 (UTC)
Note: Same for your edits [1] and [2]. See wp:primary source, wp:FRINGE, wp:UNDUE. - DVdm (talk) 17:06, 1 February 2021 (UTC)
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