@book{659,
	author = { International Network for Cassava Genetic Resources.  and  Centro de Investigacioþn Agriþcola Tropical (Bolivia)},
	title = { International Network for Cassava Genetic Resources : },
	publisher = { IPGRI,},
	year = { 1994.},
	series = { International crop network series ; },
	address = { Rome :}
}