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Bisson brothers (Bisson Frères)
Glaciers in the high mountains - ascent on a rope. Bisson brothers
Norman backyard. Bisson brothers
»Séracs du geant, Chemin du jardin«. Bisson brothers
The ascent of Mont Blanc. Bisson brothers
The Cologne Cathedral under construction. Bisson brothers
The Ottheinrichsbau of Heidelberg Castle. Bisson brothers
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