Understanding time : the science of clocks and calendars /

Tannenbaum, Beulah,

Understanding time : the science of clocks and calendars / by Beulah Tannenbaum and Myra Stillman ; illustrated by William D. Hayes. - 1st edition. - 143 pages : illustrations, maps, charts ; 21 cm

The science of clocks and calendars.

58013019


Time--Juvenile literature.
Clocks and watches--Juvenile literature.
Chronology--Juvenile literature.
Time.
Clocks and watches.
Chronology.
Chronology.
Clocks and watches.
Time.

History Juvenile calendar timekeeping Timekeeper (general)


Juvenile works.