Encyclopaedia of information and library and library science . Vol.4 

 - New Delhi:  Akashdeep Publishing House,  1993. 
 - iv,993-1328p.;  21cm 
<br/><br/><label>ISBN: </label>7158-285-0 
<br/><br/><label>Dewey Class. No.: </label>025.03  / ENC