00520nam a2200157 a 450000100080000000500110000800800410001910000200006024500830008026000570016330000100022049000700023065000240030070000190032470000190034318509582008-01-21 1986 bl uuuu u0uu1 u #d1 aASMUSSEN, L. E. aSubsurface descriptions by ground penetrating radar for watershed delineation. aAthens: Georgia Agricultural Research Stationsc1986 a15 p. a(Georgia Agricultural Research Stations. Research Bulletin, 340). aBacia Hidrográfica1 aPERKINS, H. F.1 aALLISON, H. D.