Treaties and other international acts series. 4610. Weather stations, cooperative program on Guadeloupe Island, agreement between United States and France, cxtendiug agreement of Mar. 23, 1956, as supplemented, effected by exchange of notes signed Paris, Dec. 23, 1959, and July 25, 1960; [entered Into force July 25, 1960, operative retroactively July 1, 1959].