Richards, E. G.  1932- <br/><br/>
Mapping time:  the calendar and its history/ 
E.G. Richards. 
 - Oxford:  Oxford University Press,  1999. 
 - xxi, 438 p.:  ill.;  20 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0192862057 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calendar--History.<br/>Calendars--History.