World directory of map collections / 
compiled and edited by Olivier Loiseaux on behalf of the Section of Geography and Map Libraries. 
 - 4th ed 
 - München :  K.G. Saur,  2000. 
 - IX, 546 p. ;  21 cm. 
 - IFLA publications  92/93 .
 - IFLA publications  92/93 .
<br/><br/><label>ISBN: </label>3-598-21818-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Map collections--Congresses