Rahman's Percentage Calculator :  for calculating commission, discount, sales tax, customs duty etc. / 

 - Dhaka :  Rahman Publishing Company,  1960. 
 - 104 p. ;  22 cm. 
<br/><br/>320  320 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Collections of general statistics
<br/><br/><label>Dewey Class. No.: </label>310 / R129p