A brief study of the first creatures on earth to develop voices and an aversion to dry skin.
- ISBN10 0064450430
- ISBN13 9780064450430
- Publish Date 1 January 1987 (first published 1 January 1968)
- Publish Status Out of Print
- Out of Print 18 March 2014
- Publish Country US
- Imprint HarperCollins Children's Books
- Format Paperback (US Trade)
- Pages 40
- Language English