Bibliography: Remove entries with no "useful" information?

[MattHeffron]

There are some entries with no "useful" information content.
They only note that something exists without any way to reference, or see the entry.

Should such entries be removed from the bibliography?

For example, there are 5 "Medley Advertisement: ..." entries, 4 of which have no abstract nor URL to the "document". Other than noting that the advertisement was in "AI Expert", Volume: 8 Issue: 9. Is there really any value in this bibliography entry?

[pamoroso]

If enough information to complete the entry can be found (e.g. URL, PDF) I'd keep it and proceed, otherwise delete the entry.

[masinter]

I would start with the idea that this is an error in metadata addition. So just deleting the entry from Zotero seems like the wrong direction.

How about moving the Zotero entry from "Exported to interlisp.org" to either "should be removed" or "in progress" (or make up another category). And annotate it with a note which explains what you did and other relevant entries.