Line, Maurice B. <br/><br/>
Boletˇn Dup ;   No. 15 

 - Yorkshire-XXK :   International Federation of Library Associations and Institutions,   1990. 
 - páginas 3-4 
 - Irregular 
 - No. 15(Jul.1990) 
 - Boletˇn Dup ;   No. 15 .