Richey, J. E. <br/><br/>
Elements of engineering geology 

 - SIR ISAAC PITMAN & SONS  London  1964 
 - 157p.  fig. 
<br/><br/><label>Nat. Bib. No.: </label>2882 
<br/><br/><label>Universal Decimal Class. No.: </label>551  / RIC