000			00600nam a2200169 a 4500
005			20191218054505.0
008			090403s19uu xx 00 eng d
100	1	0	_aTannenbaum, Beulah
245	1	0	_aUnderstanding time : _bthe science of clocks and calendars / _cBeulah Tannenbaum and Myra Stillman ; illustrated by William D. Hayes.
260	0		_aNew York : _bMcGraw-Hill, _cc1958.
300			_a143 p. : ill.
500			_aIncludes index.
650			_aTime
650			_aClocks and watches
650		4	_aChronology
852			_7OLOPSC
999			_c55467 _d55467