537 GUPTA, R . K . MATHEMATICAL THEORY OF ELECTRICITY AND MAGNETISM / / R . K . GUPTA & H . P . SHARMA. - 2ND ED. - MEERUT: : KEDAR NATH RAM NATH,, 1979. xii+xii 838 P.. * EELECTRICITY. MAGNETISM. * SHARMA, H . C . * Title