Agreements between the United States of America and Brazil extending and amending the agreement of January 3, 1946, respecting vocational industrial education. Effected by exchange of notes signed at Rio de Janeiro August 23 and, September 29, 1949; entered into force October 4, 1949, operative retroactively from June 30, 1948. And exchange of notes signed at Rio de Janeiro July 23 and October 21 and 27, 1948; entered into force October 30, 1948, operative retroactively from June 30, 1948.