Electrical wiring, estimating and costing : M.K.S. units for technical schools, industrial institutes, N.C.C., state diplomas, electrician and supervisory courses / S. L. Uppal & J. M. Laroia Uppal, S. L. Electric wiring. 621.3 UPE Delhi : Khanna, c1983. c1983. 1983 Text 515 p. : eng