UNIX system V release 4 :  user's guide 

 - Englewood Cliffs, N. J. :  Prentice-Hall,  1990 
 - 1 v. (various pagings) :  ill. ;  24 cm. 
<br/><br/> At head of title : AT & T  'UNIX Software Operation.' 
<br/><br/><label>ISBN: </label>0139470522 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>UNIX System V (Computer file)