<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Combustibles</topic></authority><related type="narrower"><topic>Carbón</topic></related><related type="narrower"><topic>Carbón vegetal</topic></related><related type="narrower"><topic>Carburantes</topic></related><related type="narrower"><topic>Combustibles nucleares</topic></related><related type="narrower"><topic>Energía de la biomasa</topic></related><related type="narrower"><topic>Gases licuados</topic></related><related type="other"><topic>Recursos energéticos</topic></related><related type="other"><topic>Hidrocarburos</topic></related><related type="other"><topic>Calderas</topic></related><related type="other"><topic>Butano</topic></related><related type="other"><topic>Combustión</topic></related><related type="other"><topic>Gases naturales</topic></related><related type="other"><topic>Petróleo-Productos</topic></related><related type="other"><topic>Política energética</topic></related><related type="other"><topic>Aceites y grasas</topic></related><related type="other"><topic>Gas ciudad</topic></related><related type="broader"><topic>Geología económica</topic></related></mads>