Taxation, shipping and aircraft : agreement between the United States of America and Panama, amending the arrangement of January 15, February 8 and March 28, 1941, effected by exchange of notes dated at Panama July 30 and December 30, 1987.
Washington, D.C. : Dept. of State : For sale by the Supt. of Docs., U.S. G.P.O., [1993?]