File:America's Highways 1776–1976 - page 451a.jpg
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Original file (2,441 × 1,054 pixels, file size: 1.65 MB, MIME type: image/jpeg)
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Summary
| Description |
English: By the 1920’s, crawler tractors were pulling scrapers and other equipment. This tractor could pull 5 scrapers at once, enabling these men to excavate and move material more efficiently. |
| Date | |
| Source | https://en.wikisource.org/wiki/Page:America%27s_Highways_1776%E2%80%931976.djvu/457 |
| Author | Federal Highway Administration |
Licensing
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This image is a work of a United States Department of Transportation employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. | 
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:32, 30 January 2023 | | 2,441 × 1,054 (1.65 MB) | Sp1nd01 | Uploaded a work by Federal Highway Administration from https://en.wikisource.org/wiki/Page:America%27s_Highways_1776%E2%80%931976.djvu/457 with UploadWizard |
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