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 Print
- Out of Print 25 September 2024
- Publish Country IN
- Publisher Penguin Random House India
- Imprint Penguin
- Edition Illustrated edition
- Format Hardcover
- Pages 45
- Language English