. . "Aviation, transport services : agreement between the United States of America and the Socialist Federal Republic of Yugoslavia relating to the agreements of September 27, 1973 and December 15, 1977, as amended and extended, effected by exchange of notes dated at Belgrade March 17, and May 19, 1982 with memorandum of understandings signed at Belgrade April 15, 1981"@en . . . . . . . . . . . . . "United States." . .