This unions history is illusive. I have read that locals may have merged into United Packinghouse Workers of America C.I.O. briefly, but left because of communist influence in UPWA.
A blog archiving the history of struggle-based, rank-and-file led, militant trade unions through pamphlets, photos & other union ephemera. This blog focuses on C.I.O. unions (1935-1955), and the American "Left's" involvement in social movements. An injury to one is an injury to all!