Rocks : hard, soft, smooth, and rough - Rosinsky, Natalie M. (Natalie Myra); John, Matthew (Minneapolis, Minn. : Picture Window Books, 2003)
The story of rocks -- Igneous rocks -- Sedimentary rocks -- Metamorphic rocks -- Rocks chart -- Activities -- Rock solid facts: Mohs hardness scale.
Includes bibliographical references (p. 24) and index.
Keywords: Rocks; Rocks -- Juvenile literature