How did we find out the earth is round?

Discusses the theories that led to the discovery that the earth was round.

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Bibliographic Details
Main Author: Asimov, Isaac 1920-
Other Authors: Kalmenoff, Matthew
Format: Unknown
Published: London Lion 1976
Series:His How did we find out ... series
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Description
Summary:Discusses the theories that led to the discovery that the earth was round.
Physical Description:59 p. illus. 22 cm
ISBN:856862215