Newscopy: "SOUTHERN CROSSING?--Famed Architect Frank Lloyd Wright's model of a proposed new San Francisco Bay bridge is examined by a teacher and his students from Marshall School, 15th and Capp-sts, on a visit to the San Francisco Museum of Art, where the model is on display. The bridge would be built entirely of concrete, from Army-st to Alameda. Its designer considers it far superior to the steel-type spans previously supported by other factions."