Steinway & Sons: differenze tra le versioni
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Riga 81:
* {{cita web|http://www.pianobuyer.com/current-issue/acoustic-brands-steinway.html|''Acoustic & Digital Piano Buyer. Fall 2016 Edition'', voce: Steinway & Sons}}
* {{cita web|http://www.pianobuyer.com/current-issue/05a-the-new-piano-market-ratings-recommendations.html|''Acoustic & Digital Piano Buyer. Fall 2016 Edition'': Steinway classificata ai vertici tra le marche di alto livello}}
* {{cita web|http://www.laguardiawagnerarchive.lagcc.cuny.edu/|La Guardia and Wagner Archives - Steinway & Sons Collection - Long Island City, NY - Stati Uniti}}
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