<?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://tesauro.serviciokoha.com/vocab/">GASES INERTES</topic></authority><related type="other"><topic>AIRE</topic></related><variant type="other"><topic>ARGÓN</topic></variant><variant type="other"><topic>HELIO</topic></variant><variant type="other"><topic>NEÓN</topic></variant> <note xml:lang="es">Gases que componen el aire sin reaccionar con otras sustancias. </note></mads>