1. Tractors and workers "pull together" to start biggest protest day in Madison Collection: Agricultural Communications Documentation Center (ACDC) Contributers: Welch, Lynn (author) and Center for Media and Democracy, Madison, Wisconsin. Format: Commentary Publication Date: 2011-03-13 Published: USA Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 180 Document Number: C36225 Notes: 1 page.