Category:CS1 maint: ref=harv

The message is not an error message. There is no need for regular editors to take action with respect to this message. The message and this category are being used to track instances of certain citation templates that use ref with a value of harv.

This is a tracking category for CS1 citations that use harv. That parameter is now supplied by default by CS1 templates, so harv can safely be removed from CS1 citation templates without affecting functionality.

Pages in this category should only be added by Module:Citation/CS1.