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)