AUTHOR: Emerson, D. W.
     TITLE: The determination of groundwater levels in sands by the seismic
            refraction method
 PUBLISHER: Inst. engineers australia civil eng. trans., v. ce 10, no. 1, p.
            15-18
      YEAR: 1968
MAJOR DESC: experimental studies; ground water; interpretation; levels;
            sands; seismic methods; theoretical