000 00318pam a2200133a 44500
082 _a621.3198
_bR976e
100 _aRyder, R. W.
245 1 _aEARTHING PRINCIPLES AND PRACTICE
260 _aLondon
_bPitman
_c1952
300 _a108
650 _aElectric Currents -- Grounding
964 _gCIRC
997 _a6291 C
999 _c416858
_d416858