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{{cite web |url=https://marcus.uib.no/instance/reference/296f9594b663e7d9f527bd753fbc0f124c35242b |title=ubb-kk-n-230-021: Hundre elektriske år... (s. 57) |author=Avdeling for spesialsamlinger |accessdate=Thu Mar 28, 2024 |publisher=University of Bergen Library}}