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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Fibras sintéticas</topic></authority><related type="narrower"><topic>Fibras de vidrio</topic></related><related type="narrower"><topic>Fibras ópticas</topic></related><related type="narrower"><topic>Fibras textiles sintéticas</topic></related><related type="other"><topic>Poliésteres</topic></related><related type="other"><topic>Polimerización</topic></related><related type="other"><topic>Celulosa</topic></related><related type="other"><topic>Fibras textiles</topic></related><variant type="other"><topic>Fibras artificiales</topic></variant></mads>