TY  - GEN
AU  - Willoughby, David A.
TI  - Horizontal directional drilling: utility and pipeline applications 
SN  - 007145473X
U1  - 622.3381 
PY  - 2005///
CY  - New York
PB  - McGraw-Hill Book company
KW  - Directional Drilling
KW  - Utility-Pipeline Applications
ER  -