000			002770000a22001210004500
008			160829b1931 xxu||||| |||| 00| 0 eng d
041			_aeng
080			_a621.31922 _bW3
942			_cBK
100			_aWatson, C.G.
245			_aSags and tensions in overhead lines
260			_c1931
999			_c7850 _d7850