"Rocks Juvenile literature." . . "JUVENILE NONFICTION / Science & Nature / General (see also headings under Animals or Technology)" . . . . "JUVENILE NONFICTION / General" . . "Rocks." . . . "Electronic books"@en . . . "Juvenile works"@en . "Juvenile works" . . . . . . . "Learn some fun facts about rocks." . "Rock explores what rock is, where it comes from, how it's made, what its properties are, and what it is used for."@en . "Rock"@en . "Rock" . . . . . . .