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June 11, 1998 - Researchers look at data
UMG22A57_214

June 11, 1998 - Researchers look at data

Pacific Northwest Seismic Network scientists checking data prior to uncovering an above ground seismic vault, Mount Baker, Washington ca. 2010
UMG22A39_351

Pacific Northwest Seismic Network scientists check...

Social Security Board Records Office - working at machine listing numbers on loose leaf ledger .
UMG21A21_300

Social Security Board Records Office - working at ...

15 Million Bit Memory Drum
UMG20A12_233

15 Million Bit Memory Drum