Traces the ways in which man discovered the true shape of the earth.
- ISBN10 0670785342
- ISBN13 9780670785346
- Publish Date 8 September 1970 (first published 9 September 1963)
- Publish Status Out of Stock
- Out of Print 11 October 2008
- Publish Country US
- Publisher Penguin Books Australia
- Imprint Viking Children's Books
- Edition Illustrated edition
- Format Hardcover
- Pages 45
- Language English