<?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/">Astronáutica</topic></authority><related type="narrower"><topic>Satélites artificiales</topic></related><related type="narrower"><topic>Ovnis</topic></related><related type="narrower"><topic>Vuelos espaciales</topic></related><related type="other"><topic>Guerra espacial</topic></related><related type="other"><topic>Aeronáutica</topic></related><related type="other"><topic>Exploración espacial</topic></related><related type="other"><topic>Espacio exterior-Exploración</topic></related><related type="other"><topic>Vuelos espaciales a la luna</topic></related><variant type="other"><topic>Cosmonáutica</topic></variant> <note xml:lang="es"><![CDATA[ Úsase para obras sobre la ciencia y la técnica de la navegación entre los astros: ]]></note></mads>