Crossley, John N. <br/><br/>
The emergence of number/ 
by John N. Crossley. 
 - Yarra Glen, Vic.:  Upside Down A Book Co.,  1980. 
 - 376 p.;  25 cm. 
<br/><br/> Index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0949865001 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numeration---History
<br/><br/><label>Dewey Class. No.: </label>510.9  / C951e