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• Brocher, T. M.; Christensen, N. I.
  Density and Velocity Relationships for Digital Sonic and Density Logs from Coastal Washington and Laboratory Measurements of Olympic Peninsula Mafic Rocks and Greywackes.
  January 2001, 34 p.
  Identifying Number(s): USGS/OFR-01-264
  Keywords: Wave velocity; Sonic velocity; Laboratory tests; Density; Boreholes; Mafic rocks; Velocity; Shear waves; Greywackes; Test wells; Compression waves; Seismic waves

• Brocher, T. M.; Ruebel, A. L.
  Compilation of 29 Sonic and Density Logs from 23 Oil Test Wells in Western Washington State.
  January 1998, 66 p.
  Identifying Number(s): USGS-OFR-98-249
  Keywords: Washington (State); Ground motion; Exploratory wells; Density; Earthquakes; Volcanic rocks; Seismic velocity; Three dimensional models; Oil test wells; Data compilation; Travel time; Stratigraphy