Kuhlmann, J. H. H., & Tsang, N. F. (1950). Design of electrical apparatus (3rd ed.). Wiley.
Dyfyniad Arddull ChicagoKuhlmann, John Henry Helwig, and N F. Tsang. Design of Electrical Apparatus. 3rd ed. N.Y.: Wiley, 1950.
Dyfyniad MLAKuhlmann, John Henry Helwig, and N F. Tsang. Design of Electrical Apparatus. 3rd ed. Wiley, 1950.
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