<?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">[glass by composition or origin]</topic></authority><related type="narrower"><topic>borosilicate glass</topic></related><related type="narrower"><topic>fused silica glass</topic></related><related type="narrower"><topic>lead glass</topic></related><related type="narrower"><topic>ruby glass</topic></related><related type="narrower"><topic>cristallo</topic></related><related type="narrower"><topic>opaque white glass</topic></related><related type="narrower"><topic>lime glass</topic></related><related type="narrower"><topic>green glass</topic></related><related type="narrower"><topic>hyalith glass</topic></related><related type="narrower"><topic>uranium glass</topic></related><related type="narrower"><topic>cobalt glass</topic></related><related type="narrower"><topic>cadmium sulfide glass</topic></related><related type="narrower"><topic>forest glass</topic></related><related type="narrower"><topic>smalt</topic></related><related type="narrower"><topic>opaque red glass</topic></related><related type="narrower"><topic>tektite</topic></related><related type="narrower"><topic>Libyan desert glass</topic></related><related type="narrower"><topic>nonlead glass</topic></related><related type="broader"><topic>glass</topic></related></mads>