@book{58528,
	author = {Ahmad, Yusuf J. and Kassas, Mohammed. and United Nations Environment Programme.},
	title = {Desertification :},
	publisher = {Hodder and Stoughton,},
	year = {1987.},
	address = {London :},
	note = {Sponsored by the United Nations Environment Programme"- (t.p.)}
}