Title from title screen (viewed September 15, 2014).
Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
"New techniques in direct-current resistivity exploration."
"Formulas defining two types of modified Dar Zarrouk curves are used to invert Schlumberger sounding curves, uring an iterative procedure. The number of layers, which is equal to the number of points on the inverted curve, is reduced by automatically smoothing the corresponding DZ curve."
Bibliography
Includes bibliographical references (pages 37-39).