<?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/">Lagos</topic></authority><related type="other"><topic>Sedimentos lacustres</topic></related><related type="other"><topic>Eutrofización</topic></related><related type="other"><topic>Limnología</topic></related><related type="other"><topic>Navegación interior</topic></related><related type="other"><topic>Pesca de agua dulce</topic></related><related type="broader"><topic>Aguas superficiales</topic></related><variant type="other"><topic>Lagunas</topic></variant></mads>