@book{63514,
	author = {Sweezy, Paul Marlor},
	title = {La transición del feudalismo al capitalismo},
	publisher = {Editorial Ayuso},
	year = {1976},
	series = {Foundations of history library},
	address = {Madrid},
	edition = {6a. ed.},
	note = {Translation of : The transition from feudalism to capitalism.}
}