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Farm safety problem of child riding on the side of a moving tractor, 1953

Little Sorenson rides on a tractor by standing on the side with Irving Sorenson driving, showing a farm safety issue.

Farm safety problem of child riding on the side of a moving tractor, 1953

Little Sorenson rides on a tractor by standing on the side with Irving Sorenson driving, showing a farm safety issue.

Dr. Bockhop and students observing a tillage system with a model tractor, 1957

Dr. Clarence Bockhop (left) and two students observe a plain tillage linkage system with a model tractor.

Dr. Bockhop and students observing a tillage system with a model tractor, 1957

Dr. Clarence Bockhop (left) and two students observe a plain tillage linkage system with a model tractor.

Combine unloading crops into a wagon, rear close-up view, 1955

In Washington County, Iowa, a combine unloads crops into a wagon pulled by a tractor, in a rear close-up view.

Combine unloading crops into a wagon, rear close-up view, 1955

In Washington County, Iowa, a combine unloads crops into a wagon pulled by a tractor, in a rear close-up view.

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