Willems, N. <br/><br/>
Strength of materials   
by N. Willems, John T. Easley, Stanley T. Rolfe 
 - New York  McGraw-Hill Book Company  1981 
 - xviii, 508p. 
<br/><br/><label>ISBN: </label>0070702977 
<br/><br/><label>Dewey Class. No.: </label>620.112  / N811