The Scientific American Book of Great Science Fair Projects by Scientific American, Marc Rosner Published in November 6, 2000, Jossey-Bass The Scientific American Book of Great Science Fair Projects Scientific American, Marc Rosner Change Cover Language: English ISBN 10: 0471356255 ISBN 13: 9780471356257
description edit First sentence: Before there were mechanical clocks, people used the Sun to tell time. Table of contents edit No table of contents available Add it!
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