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| Date: | 1944 |
|---|---|
| Description: | A man uses an International crawler tractor (TracTracTor) equipped with a bulldozer blade on a hillside in the construction of a road. The original caption... |
| Date: | 11 13 1971 |
|---|---|
| Description: | Elevated view of a man operating a Hough H 400 to move rock. L.R. Skelton and Company has contract to construct 3.25 miles of Interstate I-79 in Clay Count... |
| Date: | 11 13 1971 |
|---|---|
| Description: | Slightly elevated view of men operating a Hough H 400 and PH 180 (T50) to move rocks. L.R. Skelton and Company has contract to construct 3.25 miles of Inte... |
| Date: | 11 13 1971 |
|---|---|
| Description: | Elevated view of men operating a Hough H 400 and PH 180 (T50) to move rocks. L.R. Skelton and Company has contract to construct 3.25 miles of Interstate I-... |
| Date: | 11 13 1971 |
|---|---|
| Description: | Elevated view of men operating a Hough H 400 and PH 180 (T50) to move rocks. L.R. Skelton and Company has contract to construct 3.25 miles of Interstate I-... |
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