Echoes
By: by Bernice Kohn ; illustrated by Dan Connor.
Contributors: Connor, Dan.
Publisher: Dandelion Press
Published: 1979
Place of publication: New York
Language: eng
Number of pages: 32
Subjects: Echo -- Juvenile literature.; Echo.
Description: Describes the basic characteristics of echoes and how, by studying them, man has gained valuable information about the nature of sonar exploration and navigation.
Notes: "The text of this book was first published, in somewhat different form, in 1965."