Pender, H., & Del Mar, W. A. (1949). Electrical engineers' handbook (4a. ed.). John Wiley.
Chicago-čujuhus (17. p.)Pender, Harold, juo William A. Del Mar. Electrical Engineers' Handbook. 4a. ed. Nueva York: John Wiley, 1949.
MLA-čujuhus (9. p.)Pender, Harold, juo William A. Del Mar. Electrical Engineers' Handbook. 4a. ed. John Wiley, 1949.
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