The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars, V. V. Nesterov, A. V. Kuzmin, N. T. Ashimbaeva, A. A. Volchkov, S. Röser, and U. Bastian, Astronomy and Astrophysics Supplement Series110 (1995), pp. 367–370, Bibcode: 1995A&AS..110..367N.
The Henry Draper extension, Annie J. Cannon, Annals of Harvard College Observatory100 (1925–1936), Bibcode: 1936AnHar.100....1C.
The Henry Draper Memorial, Annie J. Cannon, Journal of the Royal Astronomical Society of Canada9, #5 (May–June 1915), pp. 203–215, Bibcode: 1915JRASC...9..203C.
The Draper Catalogue of stellar spectra photographed with the 8-inch Bache telescope as a part of the Henry Draper memorial, Edward C. Pickering, Annals of Harvard College Observatory27 (1890), Bibcode: 1890AnHar..27....1P. See in particular pp. 1–2.
Spectra of bright stars photographed with the 11-inch Draper Telescope as part of the Henry Draper Memorial, Antonia C. Maury and Edward C. Pickering, Annals of Harvard College Observatory28, part 1 (1897), pp. 1–128, Bibcode: 1897AnHar..28....1M.
Spectra of bright southern stars photographed with the 13-inch Boyden telescope as part of the Henry Draper Memorial, Annie J. Cannon and Edward C. Pickering, Annals of Harvard College Observatory28, part 2 (1901), pp. 129–263, Bibcode: 1901AnHar..28..129C.
p. 1, The Henry Draper charts of stellar spectra, Annie J. Cannon and Harlow Shapley, Annals of Harvard College Observatory105, #1 (1937), pp. 1–19, Bibcode: 1937AnHar.105....1C.
The Henry Draper extension. II, Annie J. Cannon and Margaret Walton Mayall, Annals of Harvard College Observatory112 (1949), Bibcode: 1949AnHar.112....1C.
