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100   $a20030508d2003      ua             0
101 0 $aeng
135   $aurmn||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aFour models used for numerical simulation of a borehole radar antenna$b[electronic resource] /$fby Karl J. Ellefsen and David L. Wright
205   $aVersion 1.0.
210  1$a[Denver, Colo.?] :$cU.S. Dept. of the Interior, U.S. Geological Survey,$d[2003]
225 1 $aOpen-file report ;$v2003-03-155
300   $aTitle from PDF title screen (viewed on Sept. 9, 2003).
330   $aIn this report are four different models that represent an antenna used by personnel at the U.S. Geological Survey for crosswell investigations.
606   $aSeismic tomography$xMathematical models
606   $aSeismic prospecting$xMathematical models
606   $aRadar in earth sciences
615  0$aSeismic tomography$xMathematical models.
615  0$aSeismic prospecting$xMathematical models.
615  0$aRadar in earth sciences.
700   $aEllefsen$b Karl$01380912
701   $aWright$b David L$g(David Leslie),$f1940-$01381552
712 02$aGeological Survey (U.S.)
801  0$bGIS
801  1$bGIS
801  2$bGPO
906   $aBOOK
912   $a9910691964903321
996   $aFour models used for numerical simulation of a borehole radar antenna$93424279
997   $aUNINA