LibreOffice values in column not find in other column04.08.20
https://ask.libreoffice.org/en/question/11233/find-values-in-column-b-that-are-not-in-column-a/
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Anonymous
https://ask.libreoffice.org/en/question/11233/find-values-in-column-b-that-are-not-in-column-a/
Anonymous