<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>66920</termId><termName>FRECUENCIA DE LOS GENES</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>FRECUENCIA DE LOS GENES</termSortkey><termCreatedDate>FRECUENCIA DE LOS GENES</termCreatedDate><relation><relationType>BT</relationType><termId>9878</termId><termName>GENETICA DE POBLACIONES</termName><termType>PT</termType></relation></term>  </Zthes>