Troy, Douglas <br/><br/>
UNIX systems / 
Douglas Troy. 
 - Quezon City :  Forefront Book Co,  1991. 
 - viii, 216 p. : ill. 
 - Computing fundamentals .
<br/><br/> Includes appendices and index. 
<br/><br/><label>ISBN: </label>971-517-034-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>UNIX (Computer operating systems)