Cassegrain-Schmidt Image Tube Camera [#1]

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  Cassegrain-Schmidt Image Tube Camera [#2]

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  [Incl c.ltr ISB to WABaum]

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  Cassegrain Schmidt [#1]

  Additional Formats

  [Incl c.ltr WABaum to Don E. Davidson; c.4 ltrs ISB to WABaum; ltr WABaum to ISB]

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  Solid Block Cassegrain Schmidt

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  Image Tube Spectrograph [#2]

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  [Incl c.ltr ISB to WABaum]

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  Thermal Compensation (DTM Image Tube)

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  [Incl ltr WABaum to ISB; c.ltr BHRule to HWB]

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  Image Tube Spectrograph Gratings, etc

  Additional Formats

  [Incl c.memo ISB to Image Tube Nebular Spectrograph Committee; c.ltr John D. Lytle to Bob Pondexter {Boller & Chivens}. [folded]

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