Conserving our environment use and reuse : the pollution crisis
The ecological system of a fishbowl depicts in miniature the ecology of the earth, demonstrating the interdependence of plant and animal organisms, and the harmful effects of man's interference with the environment.
| Tác giả của công ty: | |
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| Định dạng: | Visual Material |
| Ngôn ngữ: | English |
| Được phát hành: |
Northbrook, Illinois
Coronet MTI Film & Video
[1972].
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| Những chủ đề: |