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{{cite web |url=https://marcus.uib.no/instance/reference/aea383330105cb03bd476d903fe67bdc13203637 |title=ubb-kk-n-276-003: Hundre elektriske år... (s. 49) |author=Avdeling for spesialsamlinger |accessdate=Fri Apr 26, 2024 |publisher=University of Bergen Library}}