@book{68111,
	author = {Robinson, Joan and Beramendi, Justo G.},
	title = {Economía de la competencia imperfecta },
	publisher = {Ediciones Martínez Roca,},
	year = {1973},
	series = {Biblioteca de Ciencias Humanas},
	address = {Barcelona :},
	edition = {1a ed.}
}