Marking time :the epic quest to invent the perfect calendar

Physical Description:	422 p.
Bibliography:	Includes bibliographical references and index.
ISBN:	0471298271 (alk. paper)
Author Notes:	DUNCAN STEEL, PhD, is a space researcher who works on the dynamics of solar system objects. He has a special interest in the astronomical bases of the calendar. He teaches and directs a space research program at the University of Salford in Manchester, England. He has appeared on numerous TV shows and documentaries, including the Discovery Channel's Emmy-winning Three Minutes to Impact.