Verma, Rajni K. Electromagnetic sounding interpretion data over three-layer earth / Rajni K. Verma - New York : Plenum Pub., 1982 - v. : ill. ; 29 cm. - IFI data base library . Includes bibliographical references and index ISBN: 0306652048 LCCN: 82-9061 Subjects--Topical Terms: Electric prospectingGeophysics