00391nam a22001337a 4500 621.31921 WAT L-10, P-28 Watson, C.G 41472 Sags and tensions in overhead lines / London: Sir Isaac Pitman & Sons, Ltd. c1931 xii, 188 p,; ill.; 22cm 0 0 0 621_319210000000000_WAT MCE 379 ddc BK 545573 545573 0 0 ddc 0 0 MCE MCE 2014-05-27 0 621.31921 WAT MCE-30155 2014-05-27 2014-05-27 BK