Ball, Margaret <br/><br/>
High speed in typewriting 

 - 3rd ed 
 - Pitman Publishing, London  1974 
 - iii,61 
<br/><br/><label>ISBN: </label>0-273-42036-4 
<br/><br/><label>Dewey Class. No.: </label>652.3 Bal/ Swa