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Survivors from Earth
Project Orion: The True Story of the Atomic Spaceship
The Great Frontier
The High Frontier: Human Colonies in Space
Entering Space: Creating a Spacefaring Civilization
The Frontier in American History
The Age of Triage: Fear and Hope in an Overcrowded World
The Population Explosion
Population Biology: Concepts and Models
The Human Experiment: Two Years and Twenty Minutes Inside Biosphere 2
Kraft Ehricke's Extraterrestrial Imperative
The Case for Mars
Brave New World