U.S. SEES SETBACK TO A SINAI ACCORD
June 28-29: Ford Adm officials say on June 27 that they have failed so far to narrow differences between Egypt and Israel sufficiently to make another limited agreement on Sinai possible at this time; say chances now seem remote that Sec Kissinger will be able to undertake another 'diplomatic shuttle' to seek accord; Adm has decided to keep pressing for at least 2 wks more before giving up 'step-by-step' effort because Israel, Egypt and US believe that alternative to limited Sinai agreement--reconvening of Geneva peace conf to seek over-all Middle East settlement--will be invitation to stalemate; officials say negative attitude is result in part of initial rejection by Egyptian Pres Sadat of latest Israeli ideas on interim agreement that were given to Pres Ford by Israeli Premier Yitzhak Rabin during recent visit to Washington; Adm officials say current problems, despite some limited moves by both Egypt and Israel, are essentially same as those in Mar when Kissinger's shuttle diplomacy was unsuccessful (M)
