Langenbach, Robert G <br/><br/>
Introduction to automated data processing 
/ by Robert G. Langenbach 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1968 
 - ix, 235 p.:  llus.;  26 cm. 
<br/><br/>Bibliography: p. 232. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--Data processing<br/>Punched card systems