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300 _a1 film reel (11 min.) :
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440 0 _aEnvironment in crisis
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500 _aPanduan guru : 4 h.
500 _aMenunjukkan sumber-sumber alam yang menghadapi bahaya dimusnahkan oleh manusia dan membincangkan bagaimana menyalahgunakan sumber-sumber ini
650 0 _aConservation of natural resources
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