English operator: Panoramio described at URL: https://web.archive.org/web/20161029233534/http://www.panoramio.com/photo/107840593...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102165804/http://www.panoramio.com/photo/111366544...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101043756/http://www.panoramio.com/photo/111166038...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101050914/http://www.panoramio.com/photo/120122746...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103002443/http://www.panoramio.com/photo/111207066...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031144754/http://www.panoramio.com/photo/107053930...
Blue and golden paper marbling, book back cover, Germany, around 1880.jpg Aristeas (Roman Eisele) Public Domain...
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