[1] 2. UNESCO/UNEP Regional Training Course on Natural Resources Management: Case Studies from SADC Countries and UNESCO Regional Office for Education in Africa (Senegal) and E. Wangari, "Desertification and environmental degradation: background to the problems within Africa ," 1997.

UNESCO/UNEP Regional Training Course on Natural Resources Management: Case Studies from SADC Countries, 2nd, Bulawayo, Zimbabwe, 1996 and UNESCO Regional Office for Education in Africa (Senegal) and Wangari, Elizabeth O., "Desertification and environmental degradation: background to the problems within Africa ," 1997.

UNESCO/UNEP Regional Training Course on Natural Resources Management: Case Studies from SADC Countries, 2., UNESCO Regional Office for Education in Africa (Senegal), Wangari, E., (1997). "Desertification and environmental degradation: background to the problems within Africa,"

UNESCO/UNEP Regional Training Course on Natural Resources Management: Case Studies from SADC Countries, 2nd, Bulawayo, Zimbabwe, 1996, UNESCO Regional Office for Education in Africa (Senegal), Wangari, Elizabeth O.. (1997). "Desertification and environmental degradation: background to the problems within Africa,"