Percival Lowell

[1981] Percival Lowell and the Debate Over Extraterrestrial Life ; William C. Heffernan ; Journal of the History of Ideas 42 (1981) p. 527 [lien]
[1981] Percival Lowell: Professional Scientist or Interloper? ; Norriss S. Hetherington ; Journal of the History of Ideas 42 (1981) p. 159 [lien]
[1993] "Fireflies Flashing in Unison": Percival Lowell, Edward Morse and the Birth of Planetology ; David Strauss ; Journal for the History of Astronomy 24 (1993) p. 157 [lien]
[1994] Percival Lowell, W. H. Pickering and the founding of the Lowell Observatory ; David Strauss ; Annals of Science 51 (1994) p. 37 [lien]