Westerberg OE 609 [David Westerberg, Interational Union of Operating Engineers, Classified School Employees Union, Local 609 - food vendors near public schools], 2004, Box: 1, Folder: 10. Greg Nickels Labor Relations Records, 5259-10. Seattle Municipal Archives. https://leglas100/finding-aids/repositories/2/archival_objects/161186 Accessed May 15, 2026.