@book{63439,
	author = {Kula, Witold},
	title = {Problemas y métodos de la historia económica},
	publisher = {Ediciones Península},
	year = {1973.},
	series = {Historia , Ciencia, Sociedad, 77},
	address = {Barcelona},
	edition = {1. ed.},
	note = {Translation of Problemy i metody historii gospodarczej.}
}