<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>3857</termId><termName>Regiones polares</termName><termType>PT</termType><termLanguage>es</termLanguage><termVocabulary>INDICES DE MATERIAS</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>Regiones polares</termSortkey><termNote label="Scope"><![CDATA[ <p>Bajo este encabezamiento, se encuentran las obras que tratan de las regiones antárticas y árticas.</p> ]]></termNote><termNote label="History"><![CDATA[ <p>Revisada el 13 de noviembre de 2019</p> ]]></termNote><termNote label="Source"><![CDATA[ <p>CDU: <strong>551.32/.34</strong></p> ]]></termNote><termNote label="Source"><![CDATA[ <p>Fuente: <strong>USE</strong></p> ]]></termNote><termCreatedDate>Regiones polares</termCreatedDate><termModifiedDate>2015-07-16 10:55:52</termModifiedDate><relation><relationType>UF</relationType><termId>12714</termId><termName>Casquetes glaciales</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>12715</termId><termName>Glaciales, Casquetes</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>12716</termId><termName>Polares, Regiones</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>3830</termId><termName>Área 04. Geodinámica interna y externa</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>3858</termId><termName>Geomorfología glaciar</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>3859</termId><termName>Hielo</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>12717</termId><termName>Regiones antárticas</termName><termType>PT</termType></relation></term>  </Zthes>