Title: The threat and the opportunity of asteroids and other near-earth objects
Subtitle: Hearing before the Subcommittee on Space and Aeronautics of the Committee on ... Fifth Congress, second session, May 21, 1998
Subjects: Comets, Space mining, Asteroids, Collisions with Earth, Near-earth asteroids, Near-earth asteroids., Asteroids -- Collisions with Earth., Comets -- Collisions with Earth., Space mining.