Collinrobinson

CS1 error on Karl Freund

Hello, I'm Qwerfjkl (bot). I have automatically detected that this edit performed by you, on the page Karl Freund, may have introduced referencing errors. They are as follows:

• A "missing periodical" error. References show this error when the name of the magazine or journal is not given. Please edit the article to add the name of the magazine/journal to the reference, or use a different citation template. (Fix | Ask for help)

Please check this page and fix the errors highlighted. If you think this is a false positive, you can report it to my operator. Thanks, Qwerfjkl (bot) (talk) 03:10, 20 April 2023 (UTC)