Number /  [book] 

 - London :  Macdonald Educational,  c1970. 
 - 31 p. :  ill. ;  19 cm. 
 - Macdonald first library ;  10 .
 - Macdonald first library ;  10 .
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0356032086 :  $2.25 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory<br/>Counting.
<br/><br/><label>LC Class. No.: </label>QA 241  / N967 1970 
<br/><br/><label>Dewey Class. No.: </label>513 DEM