Worm-Petersen, Severin

Plantegeografie. Hanna Resvoll...

Wilse, Anders Beer

Old Faithfull Geiser. 84.

Wilse, Anders Beer

Kogende geiser

Wilse, Anders Beer

Old Faithfull

Wilse, Anders Beer

Kogende Hull. 82.

Wilse, Anders Beer

Old Faithfull.

Wilse, Anders Beer

Geyser. 81.

Wilse, Anders Beer

Mammoth Spring

Wilse, Anders Beer

Mammoth Hot Springs. 70.

Wilse, Anders Beer

Mammoth kilden. 71.