M.A.C. TO GO AGAIN TO BIG BANKS HERE TO GET $10‐MIWON
Munic Assistance Corp to go again to major NYC banks in effort to raise $70-million to complete state's plan to finance city for next 3 mos; MAC chmn Felix G Rohatyn hopeful of banks' help; Sen Proxmire says that Fed securities guarantee sought by both city and state 'could work' to stave off city default but says that Cong probably would not enact guarantee without support of Ford Adm, int to TV program Issues and Answers; holds that city has made strong case for aid through economizing; Repr George H Mahon, int on same program, flatly opposes Fed aid; MAC to seek reaffirmation from NYC Teachers Retirement Fund that it will comply with legis mandate to buy $150-million in MAC bonds; UFT pres Albert Shanker sees 'some apprehension' among fund trustees (M)