Lihat Juga

• On the latitude of Harvard College Observatory
  oleh: Chandler, S. C.
  Terbitan: (1885)
• The Report of the Committee to Visit the Harvard College Observatory
  oleh: Metcalf, J. H., et al.
  Terbitan: (1918)
• Photometric Observations of the New Star near χ1 Orionis, made at the Harvard College Observatory
  oleh: Pickering, Edward C.
  Terbitan: (1886)
• The Thirty-Sixth Annual Report of the Director of the Astronomical Observatory of Haivard College
  oleh: Pickering, E. C.
  Terbitan: (1882)
• Discussion of a National Observatory
  oleh: Newcomb, S., et al.
  Terbitan: (1899)