United Farm Workers Vice President Dolores Huerta has been released from a hospital where she was treated for injuries suffered in a clash between protesters and police outside a George Bush campaign dinner, union officials said. Huerta, 58, suffered a ruptured spleen and two broken ribs on Sept. 14 when riot police broke up a demonstration by about 1,000 people in front of the St. Francis Hotel in San Francisco. She had her spleen removed in surgery at San Francisco General Hospital. Huerta and other demonstrators were distributing leaflets about the union’s table grape boycott, which Bush opposes. A county grand jury is investigating the incident.