Cassel, Don,  1942- <br/><br/>
PL 1 :  a structured approach / 
Don Cassel. 
 - 2d ed. 
 - Reston, Va. :  Reston Pub. Co.,  c1978. 
 - x, 261 p.  ill. ;  23 cm. 
<br/><br/> Edition for 1972 published under title: Programming language one.  Includes index. 
<br/><br/><label>ISBN: </label>0879096500 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PL/I (Computer program language)