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The Douglas Campbell Show: Corn (maize) delivery at plant, Marengo, IA (1978)
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The Douglas Campbell Show: "New Idea" Combine, Amana Colony, IA (1978)
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The Douglas Campbell Show: "New Idea" Combine, Amana Colony, IA (1978)
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The Douglas Campbell Show: Visiting Amana General Store, Amana Colony, IA (1978)
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The Douglas Campbell Show: Future store, Amana Colony, IA (1978)
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The Douglas Campbell Show: Farm, IA (1978)
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The Douglas Campbell Show: Farm, IA (1978)
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The Douglas Campbell Show: Campsite, Wildcat Den State Park, IA (1978)