<?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">masonry units</topic></authority><related type="narrower"><topic>bondstone</topic></related><related type="narrower"><topic>split</topic></related><related type="narrower"><topic>header</topic></related><related type="narrower"><topic>stretcher</topic></related><related type="narrower"><topic>cinder blocks</topic></related><related type="narrower"><topic>hollow masonry units</topic></related><related type="narrower"><topic>concrete blocks</topic></related><related type="narrower"><topic>concrete masonry units</topic></related><related type="narrower"><topic>clay blocks</topic></related><related type="narrower"><topic>gypsum blocks</topic></related><related type="broader"><topic>masonry and masonry units</topic></related><variant type="other"><topic>masonry unit</topic></variant><variant type="other"><topic>unit, masonry</topic></variant> <note xml:lang="en"><![CDATA[ Refers generally to any naturally occurring or manufactured building units composed of concrete, glass, stone, or other material. ]]></note></mads>