Scientific cooperation, earth sciences : agreement between the United States of America and the United Kingdom of Great Britain and Northern Ireland, amending and extending the memorandum of understanding of September 21 and 26, 1979, as extended, signed at Reston and Swindon April 9 and 23, 1991.
Washington, D.C. : Dept. of State : For sale by the Supt. of Docs., U.S. G.P.O., [1993?]