Trends of African imports and exports of scientific and technologica l equipment /  
Document prepared by the Secretariat of U.N. Economic Commission for Africa 
 - Paris :    UNESCO Publication ,    1974 
 - 48 p. :    ill. ;    27 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Sciientific apparatus and instruments -- Africa<br/> IMports and exports -- Scientific and technoligical equipments -- Af rica