Bedell, Frederick. History of A-C Wave Form, Its Determination and Standardization. Transactions of the American Institute of Electrical Engineers. 1942, 61 (12): 864. S2CID 51658522. doi:10.1109/T-AIEE.1942.5058456.
Bedell, Frederick. History of A-C Wave Form, Its Determination and Standardization. Transactions of the American Institute of Electrical Engineers. 1942, 61 (12): 864. S2CID 51658522. doi:10.1109/T-AIEE.1942.5058456.