TY  - RPRT
TI  - Detection and mapping of fractures and cavities using borehole radar
AU  - F.P. Haeni
AU  - Lucien Halleux
AU  - Carole D. Johnson
AU  - John W. Lane
PY  - 2002
UR  - https://pubs.usgs.gov/publication/70206347
ID  - 70206347
ER  -