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5) Negative of ISB examining plates, c. (1)
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4) ISB (top) & unknown person at 200" coudé spectrograph (1 + 1 negative)
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6) Color print of ISB and others at Santa Barbara Street, (1)
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3) ISB at A. A. Michelson exhibit, US Naval Ordnance Test Station, Inyokern, California, (1)
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