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“...Harrington summarized the content of Robert Mackinnon's paper, "A history of Agriculture around St...”
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“... the history of agriculture and the environment in that portion of North America that became the United States...”
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“... connected with the economic history of agriculture. Land is the primary wealth of North Dakota...”
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“... nations. In the Murray–Darling Basin, the very recent marked decline in river health and long history...”
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“... history of agricultural cultivation from initial deposited agriculture with ploughing conditionally...”
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