U.S. SEEKING PACTS ON CANAL STUDIES; Treaties With Latin Nations on Sea-Level Route Are Expected by Year's End
US reptdly hopes to obtain treaties by end of '65 for bldg and operation of canal; studies at sites could then proceed; US does not intend to make demands on natl sovereignty but nation chosen must not curb access or set tolls unilaterally; US would favor internatl financing and operation; map of potential routes