15 Senators to Ask Hanoi to Negotiate; 15 SENATORS PLAN APPEAL TO HANOI
15 US Sens opposed to Adm policies plan to notify Hanoi that choice is negotiations or escalation, that they oppose unilateral US withdrawal; statement, cleared and welcomed by Sec Rusk, instigated by Sen Church; Sens Fulbright, Morse, McGovern and other sponsors listed; Sen Clark proposes Adm order indefinite cease-fire to spur negotiations, s, Sen