Mercury and Venus.
- Chicago, IL : World Book, c2010.
- 64 p. : col. ill. ; 26 cm.
- Explore the solar system .
Includes index.
"An introduction to Mercury and Venus for primary and intermediate grade students with information about their features and exploration. Includes charts and diagrams, a list of highlights for each chapter, fun facts, glossary, resource list, and index"--Provided by publisher.