1. The impact of climate and man on land transformation in Central Sudan: Applications of remote sensing;Ahlcrona;Meddelanden fran Lunds Universitets Geografiska Institutioner, Avhandlinger,1988
2. Climat, Forets et Desertification de l'Afrique Tropicale;Aubreville,1949
3. Potentialities and problems of satellite remote sensing with special reference to arid and semiarid regions;Barrett;Climatic Change,1986
4. UN conference on desertification, in retrospect;Biswas,1978
5. Dynamics of deserts and drought in the Sahel;Charney;Quarterly Journal of the Royal Meteorological Society,1975