000 00279 a2200121 4500
080 _a621.3
_bC 851 E
245 1 _aElectrical technology
_cby H. Cotton
260 _aLondon
_c1957
650 _aElectrical Technology
100 1 _aCotton, H.
_d
300 _a600 p.
901 _a54029
999 _c39817
_d39817