Perko, Howard A. <br/><br/>
Helical piles :  a practical guide to design and installation / 
Howard A. Perko 
 - Hoboken, NJ :  John Wiley,  2009 
 - xvi, 512 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>9780470404799 0470404795 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Steel piling
<br/><br/><label>LC Class. No.: </label>TA786   / .P47 2009