Guide to national bibliographical informatin centres 

 - 3rd rev. and enl. ed. 
 - Paris :  Unesco,  1970 
 - 195 p. ;  22 cm. 
 - Unesco bibliographic handbooks .
<br/><br/><br/>engfre 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bibliographical centers--Directories