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, 4 x 5 in. JPEG
http://ark.cdlib.org/ark:/13030/kt7c60202j UT3258 CD M0157 (3311-2122-6709) UT3258 ark:/13030/kt7c60202j
Government; Industry; People Local government; Labor; Events; Groups Police; Communists; Demonstrations; Riots