Biography

http://209.133.204.50/id-bergmann.html (last accessed March 23, 2022)

https://archive.org/details/TheLatestBergmannArcLampsSwitchesSwitchBoardsPanelBoards/mode/2up (last accessed May 12, 2023)

https://archive.org/details/CatalogueAndPriceListOfEdisonElectricLightAppliancesAndApparatus/mode/2up (last accessed May 12, 2023)

http://reach.ieee.org/wp-content/uploads/2018/06/IEEE_REACH_Catalogue-of-Bergmann-Co.-Electric-Light-Fixtures-1880s..pdf (last accessed May 12, 2023)
 

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New York, New York United States