SAI Speed Math Academy <br/><br/>
Learn to do Math with Soroban: a Japanese Abacus 

 - USA:  CreateSpace Independent Publishing Platform,  2022. 
 - 154p. 
<br/><br/> P.B 
<br/><br/><label>ISBN: </label>9781537163291 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Japanese Abacus
<br/><br/><label>Dewey Class. No.: </label>513.2  / SAI