On time
Subtitle: from seasons to split seconds
By: by Gloria Skurzynski.
Publisher: National Geographic Society
Published: 2000
Place of publication: Washington, D.C
Language: eng
Number of pages: 41
Subjects: Time measurements -- History -- Juvenile literature.; Time measurements.
Genres: Juvenile literature.
Description: Examines the ways humans have measured time throughout history and discusses the various units that are used to keep track of it.
Notes: Includes index.