Hibbeler, R.C <br/><br/>
Engineering mechanics : statics  third edition 
R. C. Hibbeler 
 - Singapore  Prentice Hall  2004 
 - xi, 639p.  ill.  23cm 
<br/><br/> includes index : p.628 - 639 
<br/><br/><label>ISBN: </label>0131248448 
<br/><br/><label>LC Class. No.: </label>TA350.  / H48 2004