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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Empresas periodísticas</topic></authority><related type="other"><topic>Publicaciones periódicas-Edición</topic></related><related type="other"><topic>Periodismo</topic></related><related type="other"><topic>Periódicos-Edición</topic></related><related type="other"><topic>Prensa</topic></related><variant type="other"><topic>Industria periodística</topic></variant><variant type="other"><topic>Empresas de prensa</topic></variant><variant type="other"><topic>Grupos de prensa</topic></variant><variant type="other"><topic>Sociedades de prensa</topic></variant></mads>