Zohdy, Adel A. R.  1935-2014 <br/><br/>
Variable Azimuth Schlumberger Resistivity Sounding and Profiling Near a Vertical Contact / 
By Adel A. R. Zohdy. 
 -- Washington :   United States Government Printing Office,  
 - 22 p. + 1 plan pleg. -- 
 (Geological Survey Bulletin  ;  1313-A).
<br/><br/> Fecha real de registro 21-05-1971 
<br/><br/><label>Universal Decimal Class. No.: </label>550.34