Una gota de agua
Una gota de agua
A drop of water is taken to a laboratory in San Juan, Puerto Rico to determine its purity. The film communicates scientific health information, such as the need to boil drinking water.
- Είδος: Ντοκυμαντέρ
- Διευθυντής: Jack Delano
- Ηθοποιοί: Amílcar Tirado
- Χώρα: Puerto Rico