000 002690000a22001210004500
245 _aElectric transmission lines
100 _aSkilling, H.H.
260 _aNew York
_bMcGraw Hill
_c1951
300 _a438 p.
080 _a621.315
_bS5
041 _aEN
942 _cBK
999 _c52669
_d52669