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| primaryMedia | Title | Sub-Title | Date | Object Number |
|---|---|---|---|---|
 | Hart-Parr 30 Develops 26.5 Drawbar Horsepower | What The Bootstrap Test Proves | 1920 | RC.2019.020.0026 |
 | Super-Powered Rumely OilPull Tractors | 1928 | RC.1983.000.1871 |