Byles, R.B. <br/><br/>
The card index system: its principles, uses, operation, and component parts 
by R.B. Byles 
 - 2nd ed. 
 - London  Pitman  1915 
 - 101p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Office Equipment<br/>lndexing
<br/><br/><label>Dewey Class. No.: </label>I537 B993