The book of facts / 
 Addition 
Edited by Harold Wheeler, and compiled by F.L. Dunbar. 
 - [Kedron, Qld.] :  Origo Education,  c2007. 
 - 639p. :  ill. ;  19 cm. 
<br/><br/> "A comprehensive guide for teaching addition facts". 
<br/><br/><label>ISBN: </label>9781921023439 (pbk.) : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Addition--Study and teaching.<br/>Addition--Problems, exercises, etc.
<br/><br/><label>Dewey Class. No.: </label>909