@book{74723,
	author = {Starkey, Paul and Ndiamé, Fadel and West Africa Animal Traction Networkshop},
	title = {Animal power in farming systems},
	publisher = {Friedr. Vieweg & Sohn,},
	year = {1988.},
	address = {Braunschweig, Wiesbaden :},
	note = {Fotocopia}
}