<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31464146</termId><termName>helicons</termName><termType>PT</termType><termNote><![CDATA[ Large bass tubas built in circular form for convenience in carrying, first produced in Vienna in 1845. ]]></termNote><termCreatedDate>2026-03-30 21:04:56</termCreatedDate><relation><relationType>UF</relationType><termId>31464147</termId><termName>basses, helicon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31464148</termId><termName>helicon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31464149</termId><termName>helicon bass</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31464150</termId><termName>helicon basses</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31448200</termId><termName>tubas</termName><termType>PT</termType></relation></term>  </Zthes>