Gupta JB, . (1986). Coursee in Electrical Technology Vol-1. Delhi: B.D.KATARIA & SONS.
Gupta JB, . 1986. Coursee in Electrical Technology Vol-1. Delhi: B.D.KATARIA & SONS.
Gupta JB, . Coursee in Electrical Technology Vol-1. Delhi: B.D.KATARIA & SONS. 1986.