Burma's ruling socialists Friday elected Maung Maung, a moderate civilian, to head their military-dominated party following months of violent demonstrations the army has been unable to quash, official radio said. Official Rangoon Radio said Attorney General Maung Maung was elected party chairman at the 11th session of the Central Committee of the Burma Socialist Program Party. Diplomats were cautious about Maung Maung's election and said that more demonstrations were likely if the People's Assembly, meeting after the party session, did not move toward political reform. The assembly also is expected to elect a new president. "Dr. Maung Maung is the most acceptable of the ruling elite but his selection may still not satisfy the demonstrators," said one diplomat.