@book{175373,
	author = {Álvarez Saldaña, Angélica and Covarrubias Gutiérrez, Ignacio},
	title = {Notas de producción de frio /},
	publisher = {El autor,},
	year = {2008},
	address = {Chapingo ,México :},
	url = {http://10.13.5.2/tesis/106745.pdf}
}