Blar i Brage NP på forfatter "Holtedahl, Olaf"
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Notes on the geology of northwestern Spitsbergen
Holtedahl, Olaf (Skrifter;8, Research report, 1926) -
On fault lines indicated by the submarine relief in the shelf area west of Spitsbergen
Holtedahl, Olaf (Meddelelse;35, Book, 1936)