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Micrometrical measurements of 455 double stars : observed with the 11 inch refractor during the year ending September 1, 1880
- "Micrometrical measurements of 455 double stars observed with the 11 in. refractor during the year ending September 1, 1880"
- "Micrometrical measurements of 455 double stars : observed with the 11 inch refractor during the year ending September 1, 1880"@en
- "Micrometrical measurements of 455 double stars : observed with the 11 in. refractor during the year ending September 1, 1880"
- "Micrometrical measurements of 455 double stars observed with the 11 inch refractor during the year ending September 1, 1880"@en