1.
Ginebra; Organización Mundial de la Salud; 1971.
in English, French, Spanish
| WHO IRIS
| ID: who-62823
2.
Genève; Organisation mondiale de la Santé; 1971.
in English, French, Spanish
| WHO IRIS
| ID: who-62822
3.
Geneva; World Health Organization; 1971.
in English, French, Spanish
| WHO IRIS
| ID: who-37999