Communications machines
By: Sam Howard
Publisher: Raintree Childrens Books
Published: 1980
Place of publication: Milwaukee
Language: eng
Number of pages: 32
ISBN-13: 9780817213350
Subjects: Communication; Juvenile literature; Telecommunication
Description: Discusses the different machines and systems that help relay information across this country, across the oceans, and through space.
Notes: Includes index.