TY  - BOOK
ED  - U.S. National Committee on Tunneling Technology.
ED  - Geotechnical Board.
ED  - Commission on Engineering and Technical Systems.
TI  - Micro- and small-diameter tunneling
AV  - TA805 .M537 1989
U1  - 624.193 23
PY  - 1989///
CY  - Washington, District of Columbia
PB  - National Academy Press
KW  - Tunneling
KW  - Underground utility lines
KW  - Electronic books
UR  - https://ebookcentral.proquest.com/lib/bacm-ebooks/detail.action?docID=3439731
ER  -