Second United Nations Regional Cartographic Conference for the Americas, Mexico City, 3-14 September 1979.
United Nations Regional Cartographic Conference for the Americas(2nd :1979 :Mexico City)
New York : United Nations,
1984.
At head of title: Department of Technical Co-operation for Development
Coloured maps and illustrations folded in envelope
"E/CONF.71/3/Add."
Cartography