Transit Authority Insists Tunnel at 64th St. Is Best
O'Grady repts engineering rev convinces NYCTA that 64th St route is best, Estimate Bd and City Council Finance Com hearing; holds 61st St route would cost $90.22 million as against $86.09 million for 64th St routs; says NYCTA would rev matter if seismological studies showed threat to Rockefeller Inst
