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International media Interoperability Framework
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more.
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  • Keuffel & Esser 4078 Duplex Slide Rule, with case
  • Keuffel & Esser Model 4078 Duplex slide rule, with case.
  • Keuffel & Esser 4078 Duplex Slide Rule
  • Keuffel & Esser 4078 Duplex Slide Rule
  • Keuffel & Esser Model 4078 Duplex slide rule, with case.
  • Keuffel & Esser Model 4078 Duplex slide rule, with case.