1896 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series I: Correspondence of John K. Rees, 1880-1902
1896 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
1896-1897 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
1896, undated, 1896, undated Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
1897 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series I: Correspondence of John K. Rees, 1880-1902
1897 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
1899 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series I: Correspondence of John K. Rees, 1880-1902
1899 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
1899 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
1900 Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series I: Correspondence of John K. Rees, 1880-1902