<?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="https://confrides.cpd.ua.es/tematres/vocab/">Agua - Química</topic></authority><related type="broader"><topic>Área 11. Hidrología general</topic></related><variant type="other"><topic>Agua - Propiedades químicas</topic></variant><variant type="other"><topic>Aguas naturales - Química</topic></variant><variant type="other"><topic>Hidrogeoquímica</topic></variant><variant type="other"><topic>Hidroquímica</topic></variant><variant type="other"><topic>Química del agua</topic></variant><variant type="other"><topic>Química de las aguas</topic></variant> <note type="source" xml:lang="">556.114&lt;br&gt;550.46 </note></mads>