<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">stereoviewers</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31420519</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:53:18</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">stereoviewer</dcterms:alternative> <dcterms:alternative xml:lang="en">view master</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ A stereoscopic viewing device that uses a wheel or reel of slides to present two images, isolated for each eye, that together create a three-dimensional optical effect. Invented by William Gruber in 1938 as an educational device, it has been marketed as a children's toy since that time under the trademarked name "View-Master." For the device used to view individual stereo cards, popular in the 19th century, use "stereoscopes." ]]></dc:description></metadata>