Russell, A. H <br/><br/>
Rapid Calculations 

 - London :  Gregg Pub. Co. 
 - 276p. 
<br/><br/><br/>Eng. 
<br/><br/> pbk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental arithmetic, Science, Arithmetic
<br/><br/><label>Dewey Class. No.: </label>511 RUS-R 1946 7519