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co-sponsored by Council of Europe, Commission of the European Communities, Centre National d'Etudes Spatiales, University of Strasbourg
ESA Scientific & Technical Publications Branch, ESTEC, c1985 ESA SP 233
Available at 2 libraries
organised by EARTHNET in cooperation with EARSeL, ESRIN, Frascati, Italy, 11-12 December 1980
European Space Agency c1981 ESA SP 172
