Discusses animals with no backbones, including protozoans, sponges, worms, mollusks, arachnids, and arthropods.
- ISBN10 0531125505
- ISBN13 9780531125502
- Publish Date 12 December 1993
- Publish Status Out of Print
- Out of Print 14 June 2021
- Publish Country US
- Imprint Franklin Watts
- Format Hardcover
- Pages 110
- Language English