<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>3809</termId><termName>Ciclo del nitrógeno</termName><termType>PT</termType><termLanguage>es</termLanguage><termVocabulary>INDICES DE MATERIAS</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>Ciclo del nitrógeno</termSortkey><termNote label="History"><![CDATA[ <p>Revisada el 8 de noviembre de 2019</p> ]]></termNote><termNote label="Source"><![CDATA[ <p>CDU: <strong>550.42:546.17</strong></p> ]]></termNote><termNote label="Source"><![CDATA[ <p>Fuente:<strong> USE</strong></p> ]]></termNote><termCreatedDate>Ciclo del nitrógeno</termCreatedDate><relation><relationType>BT</relationType><termId>3800</termId><termName>Área 02. Geoquímica general</termName><termType>PT</termType></relation></term>  </Zthes>