Using number ideas 5 / 
Leo J. Bruckner...[et.all.]. 
 - New York :  Holt, Rinehart and Winston , Inc, 
 - 410 p. :  26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmatic
<br/><br/><label>Dewey Class. No.: </label>513.2  / USI