56
{{cite web |url=https://marcus.uib.no/instance/reference/ae8841a44ecfcbe8fd70db3c91b0361209eb6056 |title=ubb-kk-n-187-007: Hundre elektriske år... (s. 56) |author=Avdeling for spesialsamlinger |accessdate=Fri Oct 18, 2024 |publisher=University of Bergen Library}}