IBM <br/><br/>
IBM system/360 operating system PL/1 (F) language reference manual 

 - 5 
 - New York       IBM          1972 
 - 445p.  cm. 
 - IBM systems reference library .
<br/><br/><label>Standard No.: </label>37468 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating system
<br/><br/><label>Dewey Class. No.: </label>D65,8(B)91, L21-;1