<?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/">Células fotoeléctricas</topic></authority><related type="narrower"><topic>Células fotovoltaicas</topic></related><related type="other"><topic>Control remoto</topic></related><related type="other"><topic>Conversión directa de la energía</topic></related><related type="other"><topic>Fotoelectricidad</topic></related><related type="broader"><topic>Control a distancia</topic></related><related type="broader"><topic>Dispositivos optoelectrónicos</topic></related><variant type="other"><topic>Fototubos</topic></variant><variant type="other"><topic>Fotocélulas</topic></variant></mads>