Koscielniak, Bruce <br/><br/>
About time :  a first look at time and clocks / 
by Bruce Koscielniak. 
 - Boston :  Houghton Mifflin Company,  2004. 
<br/><br/> Describes the concept of time and how it has been measured throughout history, using water clocks, sundials, calendars, and atomic vibrations. 
<br/><br/><label>ISBN: </label>0-618-39668-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time<br/>Time measurements