@book{96934,
	author = {Simposio Internacional sobre Agricultura Sostenible and Tijerina Chávez, Leonardo and Reunión Nacional sobre Agricultura Sostenible},
	title = {Ponencias magistrales, resúmenes :},
	publisher = {INIFAP,},
	year = {1999},
	address = {Morelia, Mich. :}
}