"JUVENILE NONFICTION / Concepts / Sounds" . . "Sound Juvenile literature." . . "Electronic books" . . . . "Juvenile works" . "Juvenile works"@en . . . . . . "Provides a simple discussion of the sources and kinds of sounds and how we talk and hear." . . . . . . . . "Sound" . "Provides a simple discussion of sound waves, frequencies, and the uses of radar and sonar." . "Sound"@en . . "Sonido" . . . . "Electronic books"@en . "Spanish language materials." . . "SCIENCE / Acoustics & Sound" . . . .