The Great Sand Dunes
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✎ Suggest a correctionShows the sand dunes of the Great Sand Dunes National Monument in Colorado and explains the endless cycle of building and decaying as well as the geologic reason for the dunes.
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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, year, creator, length, format, sound, description
- 16mm Filmography (legacy record) — catalog record
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