| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Educational audiovisual materials: Directory of national information agencies = Documents audiovisuels pédagogiques: répertoire dorganismes nationaux dinformation | 978-92-871-O212-6 (92-871-O212-O) | 1983 |
H-O. · W H · W. H. O. · W R · World Health · World Health Organization · World Organization