Kerrod, Robin frey50 Forces and Energy New science library : Forces and energy Robin Kerrod; Illustrated by George Fryer - Chicago, IL : J.G. Ferguson Pub., 1995. - 144 p. - New Science Library Forces and energy Volume 5 . Includes index. 5. Forces and energy ISBN: 089434160X (set) LCCN: 95021537 /AC Subjects--Topical Terms: Science--Juvenile literature.Physical sciences--Juvenile literature.Science.Physical sciences. Dewey Class. No.: j500 Ker 25