Treaties and other international acts series. 4858. Telecommunications. Voice of America radio relay facilities, agreement between United States and Liberia, supplementing agreement of Aug. 13, 1959, effected by exchange of notes signed Monrovia, Aug. 8 and 15, 1960 and amending agreement effected by exchange of notes signed Monrovia, July 11 and 24, 1961; [entered into force July 24, 1961].