GUPTA G.B, . (2011). ELECTRICAL ENGINEERING. DELHI: S. K. KATARIA AND SONS PUBLISHERS AND DISTRIBUTORS.
GUPTA G.B, . 2011. ELECTRICAL ENGINEERING. DELHI: S. K. KATARIA AND SONS PUBLISHERS AND DISTRIBUTORS.
GUPTA G.B, . ELECTRICAL ENGINEERING. DELHI: S. K. KATARIA AND SONS PUBLISHERS AND DISTRIBUTORS. 2011.