Gray George R. Darley, H.C.H. <br/><br/>
Composition and properties of oil well drilling fluids 
/ [by] George R.Gray, H.C.H.Darley 
 - 4th ed. 
 - Houston  Gulf pub.  1980 
 - xii, 630 p. 
<br/><br/>  	Includes appendix and index 
<br/><br/><label>ISBN: </label>872011291 
<br/><br/><label>Dewey Class. No.: </label>622.338  / GRA