@book{89307,
	author = {Gómez Hernández, Teodoro.},
	title = {Cambios en la práctica profesional agronómica, 1980-2000 /},
	publisher = {El autor,},
	year = {2004.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/100835.pdf}
}