All San Diego Historical Society photographs are protected by international copyright and are the exclusive property of the San Diego Historical Society. http://www.sandiegohistory.org/orderjoin/copyright.htm
Photograph is also attributed to the photographer known only by the initials F.P.
1 negative : film, b&w, 5 x 4 in. JPEG
http://ark.cdlib.org/ark:/13030/kt9t1nc7rc UT3254 CD M0157 (3311-2122-6709) UT3254 ark:/13030/kt9t1nc7rc
Industry; People Labor; Events; Groups Communists; Demonstrations; Activists; Riots