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>Det centrale Norges fjeldbygning. By K. O. Björlykke. 8 and 595 pages and map. With a supplement: Notes on Graptolites from Bratland in Gausdal, Norway. By Charles Lapworth. 16 pages and plate. Norges Geologiske Under-sögelse, No. 39. Kristiania, 1905.
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Det centrale Norges fjeldbygning. By K. O. Björlykke. 8 and 595 pages and map. With a supplement: Notes on Graptolites from Bratland in Gausdal, Norway. By Charles Lapworth. 16 pages and plate. Norges Geologiske Under-sögelse, No. 39. Kristiania, 1905.