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Cunningham comet, C/1940 R2 (Cunningham) 75:2550 (2008-003)Series VI: Yerkes Observatory
Cunningham comet, C/1940 R2 (Cunningham) 75:2563 (2008-003)Series VI: Yerkes Observatory
December 17, 1940 1Series III: Events
Informal 1Series I: Individuals and Groups
Broadcasts 3Series III: Events
Broadcasts 7Series III: Events
Cunningham comet, C/1940 R2 (Cunningham) 1Series II: Buildings and Grounds
Cunningham comet, C/1940 R2 (Cunningham) 2Series II: Buildings and Grounds