Worm-Petersen, Severin
Plantegeografie. Hanna Resvoll...
Wilse, Anders Beer
Old Faithfull
Kogende geiser
Old Faithfull Geiser. 84.
Old Faithfull.
Geyser. 81.
Kogende Hull. 82.
Mammoth Hot Springs. 70.
Mammoth kilden. 71.
Mammoth Spring
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