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Administrators: Please do not delete this category even if it is empty! This category may be empty occasionally or even most of the time.

This category contains pages with {{Wikisource}} with an invalid |works= parameter. Accepted values are case-insensitive forms of by, about, both or and. The value or is discouraged; please be specific about what whether the work at Wikisource is by, about, or both by and about the author in question.