2021-05-252021-05-251933https://hdl.handle.net/11441/109396application/pdf194 p.spaAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Ferrocarriles||EspañaEl problema de los ferrocarriles españoles : antecedentes, datos, solucionesinfo:eu-repo/semantics/bookinfo:eu-repo/semantics/openAccesshttps://archive.org/details/BRes141851https://fama.us.es/permalink/34CBUA_US/3enc2g/alma991002991619704987