@book{627,
	author = {Baker, C. J. and Saxton, K. E.},
	title = {Siembra con labranza cero en la agricultura de conservación},
	publisher = {Acribia ,},
	year = {2008.},
	address = {Zaragoza :},
	note = {Título original : No-tillage seeding in conservation agriculture.}
}