Science and technology for development : report of the United Nations Conference on the Application of Science and Technology for the Benefit of the Less Developed Areas, Vol. II, Natural Resources
Science and technology for development : report of the United Nations Conference on the Application of Science and Technology for the Benefit of the Less Developed Areas, Vol. II, Natural Resources
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English:E_CONF-39_1_Vol-II-EN - PDF ; Español:E_CONF-39_1_Vol-II-ES - PDF ;