2 results containing "Astronomical observatories."
Larger image available anywhere (2)
Larger image available only at the Library of Congress
[between 1918 and 1920] | 1 negativeLC-F8- 1628 [P&P] | LC-DIG-npcc-00094 (digital file from original)
[between 1918 and 1920] | 1 negativeLC-F8- 3270 [P&P] | LC-DIG-npcc-00225 (digital file from original)
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