@book{155652,
	author = {Kelsen, Hans,},
	title = {El contrato y el tratado },
	publisher = {Ediciones Coyoacán,},
	year = {2019.},
	series = {Derecho y Sociedad ;},
	address = {México :},
	edition = {2a ed.},
	note = {Incluye índice.}
}