Bhattacharya, P. K. Direct current geoelectric sounding: principles and interpretation/ P.K. Bhattacharya and H.P. Patra - Amsterdam: Elsevier Pub, c1968 - ix, 135 p: ill., plates; 21 cm. - Methods in geochemistry and geophysics no.9 . Includes bibliographical references and index ISBN: £ 50.00 Subjects--Topical Terms: Geochemistry--MethodologyGeophysics--Methodology Dewey Class. No.: 622.15