<?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">photograph viewing equipment</topic></authority><related type="narrower"><topic>stereoscopes</topic></related><related type="narrower"><topic>megalethoscopes</topic></related><related type="narrower"><topic>stereoviewers</topic></related><related type="narrower"><topic>alethoscopes</topic></related><related type="narrower"><topic>slide trays</topic></related><related type="broader"><topic>photographic equipment</topic></related><variant type="other"><topic>equipment, photograph viewing</topic></variant> <note xml:lang="en"><![CDATA[ General term for photographic equipment specifically used for viewing.  ]]></note></mads>