Perry William E <br/><br/>
Managing systems maintenance 

 -  1981 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>45773 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cpmputer science
<br/><br/><label>Dewey Class. No.: </label>D65,8(B):82, M1