@book{4091,
	author = {Gutiérrez, Manuel María,},
	title = {Libertad de comercio :},
	publisher = {Imprenta de I. Sancha,},
	year = {1835},
	address = {Madrid :},
	url = {http://books.google.com/books?vid=BNC:1001930773&hl=ca&printsec=frontcover}
}