@book{94846,
	author = {F.P.Ferwerda and F.Wit.},
	title = {Outlines of perennial crop breeding in the tropics},
	publisher = {Veenman & Zoonen},
	year = {1969},
	series = {Landbouwhogeschool Wageningen, The Netherlands, Miscellaneous Papers, 4(1969).},
	address = {Wageningen}
}