<?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://AATesaurus.cultura.gencat.cat/aat/getty_es">capas freáticas</topic></authority><related type="broader"><topic>masas de agua y componentes de masas de agua</topic></related><variant type="other"><topic>acuífero</topic></variant><variant type="other"><topic>capa acuífera</topic></variant><variant type="other"><topic>capa freática</topic></variant><variant type="other"><topic>nivel freático</topic></variant><variant type="other"><topic>nivel hidroestático</topic></variant></mads>