975 resultados para agricultural economics
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"August, 1930."
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"December, 1930."
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"Under the direction of Mary G. Lacy."
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Includes index.
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Includes index.
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"August, 1931."
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"February, 1932."
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"Issued August 1933; revised January 1937."
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Caption title.
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Caption title.
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Caption title.
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Cover title.
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"Under the direction of Emily L. Day."
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Caption title.
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Cover title.