60
{{cite web |url=https://marcus.uib.no/instance/reference/a704aaba0111c2387023c420cb0a7628718822d2 |title=ubb-kk-n-274-061: Hundre elektriske år... (s. 60) |author=Avdeling for spesialsamlinger |accessdate=Tue Apr 23, 2024 |publisher=University of Bergen Library}}