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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Química</topic></authority><related type="narrower"><topic>Química analítica</topic></related><related type="narrower"><topic>Química farmacéutica</topic></related><related type="narrower"><topic>Química inorgánica</topic></related><related type="narrower"><topic>Reacciones químicas</topic></related><related type="narrower"><topic>Soluciones (Química)</topic></related><related type="narrower"><topic>Elementos químicos</topic></related><related type="narrower"><topic>Química recreativa</topic></related><related type="narrower"><topic>Compuestos químicos</topic></related><related type="other"><topic>Geoquímica</topic></related><related type="other"><topic>Alquimia</topic></related><related type="other"><topic>Mecánica química</topic></related><related type="other"><topic>Fitoquímica</topic></related><related type="other"><topic>Productos químicos</topic></related><related type="other"><topic>Bioquímica</topic></related></mads>