<?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">friction harps</topic></authority><related type="broader"><topic>friction idiophones</topic></related><variant type="other"><topic>aluminum harps</topic></variant><variant type="other"><topic>friction harp</topic></variant> <note xml:lang="en"><![CDATA[ Instruments that produce sound by rubbing aluminum rods instead of plucking strings, and which can be played vertically or horizontally. An original version was invented by John Calhoun Deagan and called an “aluminum harp.”  ]]></note></mads>