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{{cite web |url=https://marcus.uib.no/instance/reference/c88543058f19b3bc7d2b18d41dc0db25951d0f44 |title=ubb-kk-n-177-025: Hundre elektriske år... (s. 58) |author=Avdeling for spesialsamlinger |accessdate=Thu Apr 18, 2024 |publisher=University of Bergen Library}}