<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>26447</termId><termName>Estructura social de Estados Unidos</termName><termType>PT</termType><termCreatedDate>1998-04-02 14:50:00</termCreatedDate><relation><relationType>BT</relationType><termId>2993</termId><termName>Sociologia de Estados Unidos</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>15316</termId><termName>Estructura social de America</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>2956</termId><termName>Afrodescendientes en Estados Unidos</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>26446</termId><termName>Familia (Estados Unidos)</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>177</termId><termName>Indios de Estados Unidos</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>26445</termId><termName>Juventud (Estados Unidos)</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>35231</termId><termName>Matrimonio (Estados Unidos)</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>30011</termId><termName>Tercera edad (Estados Unidos)</termName><termType>PT</termType></relation></term>  </Zthes>