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