Van Duyn, J. A.,  1920- <br/><br/>
Practical systems and procedures manual 
J. Van Duyn 
 - Reston, Va  Reston Pub. Co.  [1975] 
 - ix, 218 p.  ill  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System analysis<br/>Computer programming
<br/><br/><label>Dewey Class. No.: </label>001.6  / 1