HELANDER, Donald P. <br/><br/>
Fundermentals of formation evaluation 
/[by] Donald P.Helander 
 - Tulsa  OGCI Publications  1983 
 - xi, 332 p. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>930972023 
<br/><br/><label>Dewey Class. No.: </label>660.2962  / HEL