Sehgal,R.L  <br/><br/>
Computing and Disk Operating Systems for Librarians / 
R.L. Sehgal 
 - New Delhi :  Ess Ess,  1994 
 - 339 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>8170001692 (hbk.)