INTERDEPENDENCE OF LIVING THINGS
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Explains sun as energy source and ecological relationships between plants, animals, and bacteria.
Sources
- 16mm Filmography (legacy record) — title, description, catalog record
- Educational Film Guide 1946 — title, creator, length, format, description, catalog record
- Bell & Howell Filmosound Library Catalog of Educational Motion Pictures, 1942 — title, length, format, color, sound, genre, description
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