Gravity is a Mystery
By: by Franklyn M. Branley. Illustrated by Don Madden.
Contributors: Madden, Don, 1927- illus.
Series: Let's-read-and-find-out science books
Publisher: Crowell
Published: 1970
Place of publication: New York
Language: eng
Number of pages: 33
Subjects: Gravitation -- Juvenile literature; Gravity
Description: Explains in simple text and illustrations what is known about the force of gravity.