BHATTACHARYA, P.K. Direct current geoelectric sounding: principles and interpretation by P.K. Bhattacharya, H.P.Patra - London Elsevier pub. 1968 - ix, 135 p.- - Methods in geochemistry and geophysics . Includes references, index. ISBN: 46581 Subjects--Topical Terms: Geology Dewey Class. No.: 551 / BHA