Slipher, V. M., List of stars Having Variable Radial Velocities, 1904, 1904
1904 List of stars Having Variable Radial Velocities Used for Bulletin # 11 and for Astrophysical Journal 20:146:48
Unknown, Tom Stafford, E.C. Slipher, and Neil Armstrong Examine a Map of Mars, 1963-01-16
During the "Next Nine" astronauts’ January 1963 visit to Lowell Observatory, staff briefed them on the observatory’s efforts to map the Moon and Mars.…
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Evening Star, "Blue Light Photos Reveal Changes on Planet Mars", 1939-07-23
"Blue Light Photos Reveal Changes on Planet Mars." Article in Evening Star, July 23, 1939
Associated Press, "Cameras Focus 'Lines' on Mars", 1935-12-22
"Cameras Focus 'Lines' on Mars." Article in Evening Star, December 22, 1935
The Cincinnati Enquirer, "Canals on Mars found to Confirm Lowell Data, Arizona Observer Says", 1941-12-31
"Canals on Mars found to Confirm Lowell Data, Arizona Observer Says." Article in The Cincinnati Enquirer, December 31, 1941
Lowell, Percival, "Detection of Venus Rotation Period and the Fundamental Physical Features of the Planet's Surface", 1896
Copy of Percival Lowell's article, compliments of the author and reprinted from Popular Astronomy
Lowell, Percival, "Drawings of Mercury", 1897
Copy of Percival Lowell's article in Astronomische Nachrichten
Schindler, Kevin, "E.C. Slipher's Mars Expeditions to South Africa", 2007
"E.C. Slipher's Mars Expeditions to South Africa." Article by Kevin Schindler in The Monthly Notes of the Astronomical Society of Southern Africa,…
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