000 00263nam a2200109Ia 4500
008 190829s9999||||xx |||||||||||||| ||und||
100 _aWall, T. F.
245 0 _aElectricity
260 _bThornton Butterworth
_aLondon
_c1939
650 _aElectricity
942 _cBK
999 _c7434
_d7434