Earth's changing surface.

Duration: 4:00

Year Published: 1961

Format: 16mm

Sound: sound

Description: P: Preservation Material NT: Negative Track AC: Acetate A: 400' 16/8/9.5mm 16mm Color Sound 400 Centron Productions McGraw-Hill Text Films

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Library of Congress

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Original permalink · Record added: 2023-11-09 14:24:00