@book{VillaLever2012,
author = {Villa Lever, Lorenza},
year = {2012},
language = {spa},
copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen},
title = {Flujos de saber en cincuenta años de Libros de Texto Gratuitos de Historia},
url = "http://dx.doi.org/10.17169/refubium-23291",
}