@book{16948,
	author = {Ferwerda, F. P. and Wit, Free,},
	title = {Outlines of perennial crop breeding in the tropics.},
	publisher = {H. Veenman & Zonen,},
	year = {1969.},
	series = {Landbouwhogeschool Wageningen. Miscellaneous papers, no. 4 (1969)},
	address = {Wageningen,}
}