<?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/">Drenaje</topic></authority><related type="narrower"><topic>Minas-Drenaje</topic></related><related type="other"><topic>Riego</topic></related><related type="other"><topic>Hidráulica agrícola</topic></related><related type="other"><topic>Ingeniería hidráulica</topic></related><related type="other"><topic>Excavación</topic></related><related type="other"><topic>Nivelación de tierras</topic></related><related type="other"><topic>Aguas subterráneas</topic></related><related type="other"><topic>Pantanos</topic></related><related type="other"><topic>Suelos</topic></related><related type="other"><topic>Aguas superficiales</topic></related><related type="other"><topic>Alcantarillado</topic></related><related type="other"><topic>Polders</topic></related><related type="other"><topic>Recuperación de tierras</topic></related><related type="broader"><topic>Ingeniería sanitaria</topic></related><variant type="other"><topic>Agua-Eliminación</topic></variant> <note xml:lang="es"><![CDATA[ Véase además el subencabezamiento: bajo determinadas materias: "Drenaje"; Minas-Drenaje ]]></note></mads>