Mercer, G.Lawrence <br/><br/>
Loose-leaf and hand-posting systems, machine accounting equipment 

 - 2ed. 
 - London  Mac donald and evans  1963 
 - 33p. 
<br/><br/><label>Subjects--Index Terms: </label>Machine accounting 
<br/><br/><label>Dewey Class. No.: </label>657  / MER