What Time Is It? - Smith, A G

Examines the ways humans have meausred time throughout history and discusses the various units that are used to keep track of it.

What Time Is It? 2001, Fitzhenry & Whiteside

ISBN-13: 9780773762190

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What Time Is It? 1996, Stoddart Kids, Toronto, Canada

ISBN-13: 9780773755253

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