Man's thumb on nature's balance.

Duration: 2160

Year Published: 1971

Creator: National Broadcasting Company.

Format: 16mm

Sound: silent

Copyright: Registered 21Jan71 · MP21440 (Jan-Jun 1971) Copyright holder: National Broadcasting Co., Inc

Description: P: Preservation Material MAG: Sprocketed Magnetic Track AC: Acetate D: 1600'(16/8/9.5mm) 16mm Silent National Broadcasting Company

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