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6 results.
Engraving 7:1368 (2008-003)Series VI: Yerkes Observatory
Informal 8:5000 (2008-003)Series VI: Yerkes Observatory
Formal 9:1472 (2008-003)Series VI: Yerkes Observatory
Informal 46:35 (2008-003)Series VI: Yerkes Observatory
Informal 46:18 (2008-003)Series VI: Yerkes Observatory
Informal 46:29 (2008-003)Series VI: Yerkes Observatory