Statistics on libraries 

 - Paris :  UNESCO,  [n.d.] 
 - 128 p.  28 cm. 
<br/><br/><label>ISBN: </label> USD 1.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library statistics
<br/><br/><label>Dewey Class. No.: </label>020