00409nam a22001457a 4500 5087 5087 201106b ||||| |||| 00| 0 eng d 621.313 G438 4052 Gibbins, E.H.H. An introduction to electrical drawing; part - II London Blackie & Son 1963 63 p. 4.00 Electric currents--Grounding BK 0 0 ddc 0 621_313000000000000_G438 0 14105 CL CL 1966-06-07 Blackie & Son 621.313 G438 03105 2020-11-06 BK 0 0 ddc 0 621_313000000000000_G438 0 14106 CL CL 1966-06-07 Blackie & Son 621.313 G438 03106 2020-11-06 BK 0 0 ddc 0 621_313000000000000_G438 0 14107 CL CL 1966-06-07 Blackie & Son 621.313 G438 03107 2020-11-06 BK