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