Summary of the national paper of the Yemen Arab Republic submitted to the United Nations Conference on Science and Technology for Development, Vienna, August 1979.
标题Summary of the national paper of the Yemen Arab Republic submitted to the United Nations Conference on Science and Technology for Development, Vienna, August 1979.
获取English:E_ECWA_NR_CONF.2_CP.7_Add.1-EN - PDF ; العربية:E_ECWA_NR_CONF.2_CP.7_Add.1-AR - PDF ;
