TY  - BOOK
AU  - Perko,Howard A.
TI  - Helical piles: a practical guide to design and installation 
SN  - 9780470549063
AV  - TA786 .P47 2009 
PY  - 2009///
CY  - Hoboken, N.J.
PB  - J. Wiley
KW  - Steel piling
KW  - Electronic books
N1  - Elektronik kitap; Includes bibliographical references and index
UR  - http://onlinelibrary.wiley.com/book/10.1002/9780470549063
ER  -