Hanson, Peggy L <br/><br/>
Keypunching 
Peggy Hanson 
 - 4th ed 
 - Englewood Cliffs, N.J.  Prentice-Hall  1984 
 - 192p. ill. 28cm 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0135149010 
<br/><br/><label>LCCN: </label>83-15951 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Punched card systems<br/>Keypunches