TY  - BOOK
AU  - Tannenbaum,Beulah
AU  - Stillman,Myra
AU  - Hayes,William Dimmity
TI  - Understanding time: the science of clocks and calendars 
PY  - 1958///]
CY  - New York
PB  - Whittlesey House
KW  - Time
KW  - Juvenile literature
KW  - Clocks and watches
KW  - Chronology
KW  - fast
KW  - History
KW  - Juvenile calendar timekeeping
KW  - Timekeeper (general)
KW  - Juvenile works
N2  - The science of clocks and calendars
ER  -