950 resultados para Soil conservation projects
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"August 1981."
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Cover title.
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"U.S. Dept. of Agriculture in cooperation with the Agricultural Experiment Station, University of Puerto Rico."
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"Issued December 1949."
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"October 1946."
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"June 1950"--Cover.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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"Issued December 1984"--P. 2.
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Shipping list no.: 88-576-P.
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Mode of access: Internet.
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Issued Jan. l, 1953- as U.S. Dept. of Agriculture. Agriculture handbook, no. 49, 79, 113, 192, 242, 281, 317, etc.