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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.
صنف: Documentary
کاسٹ: Amílcar Tirado
عملہ: Jack Delano (Cinematography), José R. Ramírez (Music), Jesús Figueroa (Assistant Camera), Jack Delano (Director), Edwin Rosskam (Screenplay)
اسٹوڈیو: Comisión de Parques y Recreos Públicos de Puerto Rico
رن ٹائم: 10 منٹ
کوالٹی: HD
رہائی: Apr 13, 1949
IMDb: 10
ملک: Puerto Rico
زبان: Español
مطلوبہ الفاظ :
