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