The Earth - Its Structure (Special Version)
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✎ Suggest a correctionExplains the theory that the earth was formed from gases and that the core of the earth is molten mineral matter. Features diagrams and pictures showing the different layers of rock in the earth's crust.
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- A-V Online (National Information Center for Educational Media). CD-ROM database of educational and documentary media, compiled and maintained by the National Information Center for Educational Media (NICEM). — title, creator, length, format, sound, description
- 16mm Filmography (legacy record) — creator, catalog record
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