Doing The World's Work
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✎ Suggest a correctionShows the contribution being made by caterpillar earthmoving and material handling equipment around the world. Features the complete line of machines and engines at work in scores of applications, implementing man's ambition to improve the world around him.
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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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