Time without clocks
Subtitle: how nature tells time
By: by Albert Piltz and Roger VanBever.
Contributors: VanBever, Roger.
Publisher: Grosset & Dunlap
Published: 1970
Place of publication: New York
Language: eng
Number of pages: 128
Subjects: Biological rhythms -- Juvenile literature.; Biological rhythms.
Description: Explains the ability of living things to determine time, direction, and the seasons without the help of man-made clocks, calendars, and compasses