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Microform Collection
Seismology Records Addendum

Time on/time off cards, all stations. For seismogram time reference. Two small rolls of 16 mm microfilm, labelled Master 1 and Master 2.

ID: 2006-00106

MEDIUM: Microform; FORMAT: 16 mm film; LENGTH: 100 feet each; QUANTITY: 2 reels

Topics: Geology

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