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1Published 1918Subjects: “...United States. Office of Experiment Stations. http://id.loc.gov/authorities/names/n82110275...”
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2Published 1917Subjects: “...United States. Office of Experiment Stations. http://id.loc.gov/authorities/names/n82110275...”
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3Published 1917Subjects: “...United States. Office of Experiment Stations. http://id.loc.gov/authorities/names/n82110275...”
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4Published 1917Subjects: “...United States. Office of Experiment Stations. http://id.loc.gov/authorities/names/n82110275...”
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5Published 1917Subjects: “...United States. Office of Experiment Stations. http://id.loc.gov/authorities/names/n82110275...”
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