Sea urchins /
Martha E. H. Rustad.
- Minneapolis, MN : Bellwether Media, c2008.
- 24 pages: color illustrations 23 cm.
- Blastoff! readers. oceans alive .
Lex: 660
"Simple text and supportive images introduce beginning readers to Sea Urchins. Intended for students in kindergarten through third grade"--Provided by publisher.