Discovery.
Series: Waves -- [level 3]; Waves (Toronto, Ont.) -- [level 3]
Publisher: Houghton Mifflin Canada
Published: 1992
Place of publication: Markham, ON
Language: eng
Number of pages: 56
Subjects: Astronomy -- Juvenile literature.; Dinosaurs -- Juvenile literature.; Science -- Juvenile literature.
Notes: Includes index.

CR