<?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/">Metales de transición</topic></authority><related type="narrower"><topic>Cadmio</topic></related><related type="narrower"><topic>Cobalto</topic></related><related type="narrower"><topic>Cobre</topic></related><related type="narrower"><topic>Cromo</topic></related><related type="narrower"><topic>Iridio</topic></related><related type="narrower"><topic>Manganeso</topic></related><related type="narrower"><topic>Mercurio (Metal)</topic></related><related type="narrower"><topic>Níquel</topic></related><related type="narrower"><topic>Osmio</topic></related><related type="narrower"><topic>Paladio</topic></related><related type="narrower"><topic>Plata</topic></related><related type="narrower"><topic>Platino</topic></related><related type="narrower"><topic>Rodio</topic></related><related type="narrower"><topic>Rutenio</topic></related><related type="narrower"><topic>Titanio</topic></related><related type="narrower"><topic>Vanadio</topic></related><related type="narrower"><topic>Volframio</topic></related><related type="narrower"><topic>Hierro</topic></related><related type="narrower"><topic>Oro</topic></related><related type="broader"><topic>Metales</topic></related><variant type="other"><topic>Elementos de transición</topic></variant></mads>