Date: | 1960 |
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Description: | Color photograph of an International TD-20 crawler tractor (TracTracTor) with attached Drott shovel loader. |
Date: | 1960 |
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Description: | A man is operating the crawler tractor outdoors. The crawler is carrying a large rock towards a truck parked on the right. Power lines are in the backgroun... |
Date: | 1960 |
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Description: | Slightly elevated view of three men working with an experimental crawler tractor indoors. Caption reads: "Experimental Crawler Tractor Equipped with a Turb... |
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