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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Industria petrolífera</topic></authority><related type="other"><topic>Industria petroquímica</topic></related><related type="other"><topic>Refinerías de petróleo</topic></related><related type="other"><topic>Productos petrolíferos</topic></related><related type="other"><topic>Ingeniería del petróleo</topic></related><related type="other"><topic>Petróleo-Refino</topic></related><related type="other"><topic>Petróleo</topic></related><related type="broader"><topic>Industria energética</topic></related><variant type="other"><topic>Industria petrolera</topic></variant><variant type="other"><topic>Industria del petróleo</topic></variant><variant type="other"><topic>Petróleo-Industria</topic></variant></mads>