Alioto Imposes Pact In Face of Dissent; Calls Strike ‘Over’
San Francisco Mayor Alioto on Aug 21 invokes his emergency powers to impose compromise wage settlement for city's striking police and firemen after Supervisors Bd rejected settlement by vote of 9-0; settlement grants police and firemen full 13% raise they were demanding, but it will not take effect until Oct 15; agreement means that police and firemen will start at $18,816 and that pact will cost city $9.6-million per yr; Supervisors Bd's original offer would have cost city $6.6-million; both Internatl Assn of Firefighters Local 798 and Police Officers Assn approve settlement and members begin returning to work; Supervisors Bd, denouncing strikers as Outlaws, scores Alioto's negotiation efforts and 1 member calls him a 'dictator'; illus (M)