Additional Formats
Cassegrain Schmidt [#2]
You might also be interested in
Image not available
Cassegrain Schmidt [#1]
Additional Formats
[Incl c.ltr WABaum to Don E. Davidson; c.4 ltrs ISB to WABaum; ltr WABaum to ISB]
Bowen
Image not available
Cassegrain-Schmidt Image Tube Camera [#2]
Additional Formats
[Incl c.ltr ISB to WABaum]
Bowen
Image not available
Cassegrain-Schmidt Image Tube Camera [#1]
Additional Formats
[Incl c.bids for camera; c.ltr Arthur A. Hoag to ISB]
Bowen