TY  - RPRT
TI  - Four models used for numerical simulation of a borehole radar antenna
AU  - Karl J. Ellefsen
AU  - David L. Wright
PY  - 2003
DO  - 10.3133/ofr03155
UR  - https://pubs.usgs.gov/publication/ofr03155
ID  - ofr03155
ER  -