000 00252pam a2200109a 44500
082 _a537.051
_bSW1024 V.75 1920
100 _a
245 1 _aELECTRICAL WORLD
260 _a
_bMcgraw-Hill Company, Newyork
_c1920
964 _gREF
997 _a57740 BASE R
999 _c449030
_d449030