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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.
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- Apr 13, 1949
- 10m
- Spanish
- Jack Delano
- Edwin Rosskam
- Released
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Comisión de Parques y Recreos Públicos de Puerto Rico