Lal,C <br/><br/>
Understanding basics of Library and Information science  Reference service&information sources (5th paper),information service (6th paper),Computers and information technology(7th paper) 

 - NewDelhi;  Ess Ess Publications ,  2005. 
<br/><br/><label>ISBN: </label>8170004373 
<br/><br/><label>Dewey Class. No.: </label>020  / LAL.U