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Percival Lowell - Wikipedia
Percival Lowell | Mars Exploration, Planetary Science & Astronomy
Percival Lowell Biography | Space
Percival Lowell: Astronomer Who Looked for Life on Mars
Lowell, Percival (1855-1916) - Harvard Square Library
The Life and Times of Percival Lowell
The story of Percival Lowell: This Week in ... - Astronomy Magazine
Percival Lowell’s Search for Life on Mars - Lowell Observatory
Tracing the Canals of Mars: An Astronomer's Obsession | Space
Percival Lowell | People | The Collection of Historical Scientific ...