Hemstock, H. F. <br/><br/>
Modern business arithmetic / 
by H. F. Hemstock, P. J. Costelloe. 
 - 3rd ed. 
 - London :  Nelson,  1974. 
 - 196 p. :  ill ;  22 cm. 
 - Modern commercial studies .
<br/><br/><label>ISBN: </label>0177410051 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business mathematics.