Gupta, R., & Sharma, B. R. (1990). Electrical engineering materials (3rd ed.). New Delhi: Satya Prakashan.
Παραπομπή Chicago StyleGupta, R.B., and B. R. Sharma. Electrical Engineering Materials. 3rd ed. New Delhi: Satya Prakashan, 1990.
Παραπομπή MLAGupta, R.B., and B. R. Sharma. Electrical Engineering Materials. 3rd ed. New Delhi: Satya Prakashan, 1990.
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