A. R. Duff  <br/><br/>
Pressures/ 
by A. R. Duff  
 - London   Longman   1969 
 - 64 pages. :  Illustrations. : 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0582321794 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pressures
<br/><br/><label>LC Class. No.: </label>QC 165   / .D82