Engelhardt, Jon M.; Ashlock, Robert B. & Wiebe, James H. <br/><br/>
Helping Children Understand and Use Numerals 

 - Allyn, Boston  1984 
 - viii, 229 
<br/><br/><label>ISBN: </label>0-205-08091-X 
<br/><br/><label>Dewey Class. No.: </label>372.7 Eng