@book{80310,
	author = {Rejesus, Roderick M. and Heisey, Paul W.},
	title = {Sources of productivity growth in wheat : a review of recent performance and medium to long-term prospects},
	publisher = {Centro Internacional de Mejoramiento de Maíz y Trigo,},
	year = {1999.},
	series = {Economía. Documento de trabajo},
	address = {México, D.F. :}
}