Prof. Mortel:
Station at Kleine Scheidegg, 2061 meters (2)
Prof. Mortel:
Station at Kleine Scheidegg, 2061 meters (1)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (2)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (3)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (4)
Prof. Mortel:
Jungfrau, 4158 meters, as seen from Jungfraujoch, 3485 meters (8)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (5)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (6)
Prof. Mortel:
Jungfrau, 4158 meters, as seen from Jungfraujoch, 3485 meters (9)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (7)
Prof. Mortel:
Jungfrau, 4158 meters, as seen from Jungfraujoch, 3485 meters (10)
Prof. Mortel:
Aletsch Glacier seen from Jungfraujoch, 3485 meters (5)
Prof. Mortel:
Aletsch Glacier seen from Jungfraujoch, 3485 meters (6)
Prof. Mortel:
Jungfrau, 4158 meters, as seen from Jungfraujoch, 3485 meters (11)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (8)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (9)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (10)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (11)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (12)
Prof. Mortel:
Aletsch Glacier seen from Jungfraujoch, 3485 meters (7)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (13)
Prof. Mortel:
Aletsch Glacier seen from Jungfraujoch, 3485 meters (1)
Prof. Mortel:
Aletsch Glacier seen from Jungfraujoch, 3485 meters (2)
Prof. Mortel:
Aletsch Glacier seen from Jungfraujoch, 3485 meters (3)
Prof. Mortel:
Jungfrau, 4158 meters, as seen from Jungfraujoch, 3485 meters (12)
Prof. Mortel:
Swiss alpine scene at Jungfraujoch, 3485 meters (14)
Prof. Mortel:
Aletsch Glacier seen from Jungfraujoch, 3485 meters (4)
Prof. Mortel:
Photograph of construction of Jungfraujoch railway tunnel (2)
Prof. Mortel:
Photograph of construction of Jungfraujoch railway tunnel (3)
Prof. Mortel:
Photograph of construction of Jungfraujoch railway tunnel (1)
