Carl Sagan

By Spangenburg, Ray, Ray Spangenburg, Kit Moser

Subjects: 1934-, Juvenile literature, Sagan, carl, 1934-1996, 1934-1996, Astronomers, Biography, Science / General, Scientists, biography, Biography: general, Children's Books/Ages 9-12 Nonfiction, General, Science, Astronomy - General, Popular Culture - General, United States, Sagan, Carl,, Science/Mathematics, Popular astronomy

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