<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>3759</termId><termName>Magnetismo terrestre</termName><termType>PT</termType><termLanguage>es</termLanguage><termVocabulary>INDICES DE MATERIAS</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>Magnetismo terrestre</termSortkey><termNote label="Scope"><![CDATA[ <p>Se puede usar con un subencabezamiento geográfico.</p> ]]></termNote><termNote label="History"><![CDATA[ <p>Revisada el 31 de octubre de 2019</p> ]]></termNote><termNote label="Source"><![CDATA[ <p>CDU:<strong> 550.38</strong></p> ]]></termNote><termNote label="Source"><![CDATA[ <p>Fuente: <strong>USE</strong></p> ]]></termNote><termCreatedDate>Magnetismo terrestre</termCreatedDate><relation><relationType>UF</relationType><termId>3763</termId><termName>Tierra - Campo magnético</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>3760</termId><termName>Campos geomagnéticos</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>3761</termId><termName>Geomagnetismo</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>3762</termId><termName>Líneas isógonas</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>3764</termId><termName>Tierra - Magnetismo</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>3727</termId><termName>Área 01. Geofísica interna y externa</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>12029</termId><termName>Área 02. Fundamentos de Cartografía</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>12085</termId><termName>Brújula</termName><termType>PT</termType></relation></term>  </Zthes>