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| Date: | 06 29 1938 |
|---|---|
| Description: | A man operates an International PD-80 power unit mounted on a suction dredge for sand and gravel. The power unit is owned by Roy Deringer of Ithaca, Michig... |
| Date: | 01 19 1938 |
|---|---|
| Description: | A young man stands on a platform above an International PA-80 power unit (converted into a P-100) at a gravel pit owned by Mogg County. |
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