Leonard, Irving2016-04-202016-04-201937https://repositorio.pucp.edu.pe/index/handle/123456789/53089No presenta resumenapplication/pdfspainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/pe/Revistas generalesinfo:eu-repo/semantics/articlehttps://purl.org/pe-repo/ocde/ford#6.00.00