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| Date: | 1920 |
|---|---|
| Description: | Back cover of a booklet produced by the Grid-Iron Grip Company entitled: "The Tractor Traction Problem Solved: Just like a locomotive, It runs on its own."... |
| Date: | 1919 |
|---|---|
| Description: | Front cover of a pamphlet advertising the Lauson 15-30 special road-building tractor. The cover features a partial color illustration of two men using a La... |
| Date: | 1921 |
|---|---|
| Description: | Back cover of a pamphlet advertising the Caterpillar tractor with a headline that reads: "Power for Every Need." It is illustrated with six photographs of ... |
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