Progress report on the observance of 1986 as Year of Cartography in Africa.
1986
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详细记录
符号E/ECA/NRD/CART/20
标题Progress report on the observance of 1986 as Year of Cartography in Africa.
日期[Addis Ababa] : UN, 22 Oct. 1986.
描述
6, 2, [1] p.
备注
At head of title: 6th United Nations Regional Cartographic Conference for Africa, Addis Ababa, 10-21 November 1986.