000			00447nam a2200169Ia 4500
008			131223s9999 xx 000 0 und d
040			_aISI KOLKATA
041			_aEnglish
082			_a621.3192 _bH252
100			_aHapp H H
245			_aDiakoptics and networks
260			_aN Y _bAcademic Press _c1971
300			_axvi,312p.
440			_aMathematics in science and engineering;v.69
650			_aElectric transmission lines
942			_cBK
999			_c65540 _d65540