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  • All fields: 19.7 x 15.6 cm
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    • Agricultural machinery, 1935

    • Farm Equipment; Agriculture; Iowa State University;
    • A driver on a steel-wheeled tractor pulling a plow toward the horizon through an unplowed field. Two automobiles are in the field in the far left distance. Another tractor is in the far right distance. A tree line on the horizon defines the edge of...

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