Agreements between the United States of America and Paraguay respecting a cooperative agricultural program in Paraguay, modifying and extending the agreement of December 31, 1942, as modified and extended. Effected by exchange of notes signed at Asunción July 22 and August 11, 1949; entered into force September 2, 1949, operative retroactively from June 30, 1949. And exchange of notes signed at Asunción June 30, 1948; entered into force July 16, 1948, operative retroactively from June 30, 1948. And exchange of notes signed at Asunción January 20 and March 3, 1947; entered into force March 3, 1947, operative from December 31, 1947.