Fourth United Nations regional cartographic conference for the Ameri cas, New Yor, 23-27 January, 1989. - United Nations Regional Cartographic Conference for the Americas 1989 : New York); United Nations; United Nations. Department of Technical Co-operation for Developm ent. (New York : United Nations., 1989)
E/CONF. 81/3
Vol. 1. Report of the conference.
Keywords: Cartography -- Congresses