Helicopters
By: by Susan Harris ; illustrated by E. Smart.
Contributors: Smart, E.
Series: An Easy-read fact book
Publisher: F. Watts
Published: 1979
Place of publication: New York
Language: eng
Number of pages: 48
Subjects: Helicopters -- Juvenile literature.; Helicopters.
Description: An account of the operation, usefulness, and history of helicopters.
Notes: Includes index.