@book{27633,
	author = {Khartoum Workshop on Arid Lands Management ( and Mabbutt, J. A. and Universidad de las Naciones Unidas.},
	title = {Proceedings},
	publisher = {United Nations University,},
	year = {1979},
	series = {NRTS, 2/UNUP},
	address = {Tokio :}
}