World guide to technical information and documentation services =  Guide mondial des centres de documentation et d'information techniques. 

 - 2a ed. 
 - París :  UNESCO,  1975. 
 - 515 p. 
 - Documentation, libraries and archives : bibliographies and - .
<br/><br/><label>ISBN: </label>9230012289 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>OC 058.7: 002.6: 6 =20 =40 "1975" WOR.