Aviation, transport services : agreement between the United States of America and Singapore, amending the agreement of March 31, 1978, as amended, effected by exchange of notes, dated at Singapore November 21 and December 3, 1991 with annex.
Washington, D.C. : Dept. of State : For sale by the Supt. of Docs., U.S. G.P.O., [1993?]