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, 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. Tucson, Arizona, USA
edited by J. A. Mabbutt and Andrew W. Wilson
Bok Engelsk 1980