Elokuvat: Douglas Harlon
- 1940
How the Ear Functions (1940)
How the Ear Functions01940HD
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![How the Ear Functions]()
- 1939
The Story of Our Flag (1939)
The Story of Our Flag01939HD
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![The Story of Our Flag]()
- 1941
How the Eye Functions (1941)
How the Eye Functions01941HD
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![How the Eye Functions]()
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