@book{78430,
	author = {Erenstein, Olaf C.A. and Cadena Iñiguez, Pedro.},
	title = {The adoption of conservation tillage in a hillside maize production system in Motozintla, Chiapas},
	publisher = {Centro Internacional de Mejoramiento de Maíz y Trigo,},
	year = {1997},
	series = {Documento},
	address = {México, D.F. :}
}