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{{cite web |url=https://marcus.uib.no/instance/reference/161dfa77752f44b2994ac913a22125e254a7157c |title=ubb-kk-n-276-008: Hundre elektriske år... (s. 42) |author=Avdeling for spesialsamlinger |accessdate=Sat Apr 20, 2024 |publisher=University of Bergen Library}}