What does Campbell stand for?

Campbell's Compendium of Roman Law - A publication (DLA)

Campbell's English Nisi Prius Reports - A publication (DLA)

Campbell's Legal Gazette Reports - Pennsylvania - A publication (DLA)

Campbell's Lives of the Chief Justices - A publication (DLA)

Campbell's Lives of the Lord Chancellors - A publication (DLA)

Campbell's Reports - 27-58 Nebraska - A publication (DLA)

Campbell's Reports of Taney's United States Circuit Court Decisions - A publication (DLA)