Identical entries, one with a comma

[LBST]

Another "go figure."

See:

Social Unionism and Membership Participation: What Role for Union Democracy?
https://labourstudies.ca/en/search/social%20unionism%20membership%20participation%20what%20role%20union%20democracy

Identical entries, but one has a superfluous comma after the ? in the title.

However, there is only entry for it in the Zotero bibliography, and it does not have the comma.