Overview
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.
Year 1949
Director Jack Delano
Crew José R. Ramírez (Music), Jesús Figueroa (Assistant Camera), Jack Delano (Cinematography), Jack Delano (Director), Edwin Rosskam (Screenplay)
Popularity 1
Language Español
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