<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">signal towers</topic></authority><related type="narrower"><topic>railroad signal towers</topic></related><related type="narrower"><topic>telecommunications towers</topic></related><related type="broader"><topic>towers</topic></related><variant type="other"><topic>signal tower</topic></variant> <note xml:lang="en"><![CDATA[ General term for elevated structures, either open or enclosed, from which signals of any kind are sent, including telegraphic, electronic, or manual signals. Examples are towers in the Great Wall of China and towers used to relay railroad signals. ]]></note></mads>