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21Contributors: “...Digitized by J. Willard Marriott Library, University of Utah...”
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22Contributors: “...Digitized by J. Willard Marriott Library, University of Utah...”
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23Contributors: “...Digitized by J. Willard Marriott Library, University of Utah...”
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24by Kelly, CharlesContributors: “...Digitized by J. Willard Marriott Library, University of Utah...”
Published 1920
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25by U.S. Soil Conservation ServiceContributors: “...Digitized by J. Willard Marriott Library, University of Utah...”
Published 1948
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26Contributors: “...Digitized by J. Willard Marriott Library, University of Utah...”
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