Man, environment, development : proceedings of the Arab Regional Symposium on Environmental Aspects and Development in the Arab Countries, held by ALESCO, N.C.R. (Sudan), and the Sudanese National Conference on Man, Environment and Development, convened by the Sudanese Association for Advancement of Science and N.C.R. (Sudan), Khartoum, 5-12 February 1972 2026-02-16T05:52:51+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... (Arab League Educational, Cultural and Scientific Organization, 1973)