Groff, James R <br/><br/>
Understanding UNIX : a conceptual guide 
by James R Groff and Paul N Weinberg 
 - 2nd 
 - Singapore  Que  1988 
 - xiv, 234p. 
<br/><br/><label>ISBN: </label>9813091037 
<br/><br/><label>Dewey Class. No.: </label>005.43  / N8826