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• Jensen, E. G.
  Filter Circuit Board for the Earthworm Seismic Data Acquisition System.
  January 2000, 22 p.
  Identifying Number(s): USGS/OFR-00-379
  Keywords: Multi-channel digitizer; Earthworm (EW) system; Specifications; Seismic networks; Schematics; Seismic waveforms; Data acquisitions; Photographs; Diagrams; Filter circuits; Processing system