Social and environmental aspects of desertification : proceedings of an Inter-Congress Meeting of the International Geographical Union Working Group on Desertification In and Around Arid Lands / edited by J. A. Mabbutt and Andrew W. Wilson
"Held in conjunction with the Arid Lands Sub-programme of the United Nations University Natural Resources Programme, and the UNESCO/MAB Programme, 3-8 January 1979, Tuscon, Arizona USA" -- T.p. verso