Atlas of Tunisia problems and suggestions : paper submitted by the Government of the Republic of Tunisia
Author(s)/Corporate Author (s)United Nations. Economic and Social Council;
United Nations. Economic Commission for Africa;
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The study of correlations between phenomena is a present tendency that has asserted itself in 1964 at the XXth Congress of the International Geographical Union in London, and at the Symposium of the International Cartographic-Association in Edinburgh, where the thematic maps produced in many countries were exhibited.