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1Government Document BookPublished 1978“…United States. Agricultural Research Service…”
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2Government Document BookPublished 1972“…United States. Agricultural Research Service…”
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3BookPublished 1991“…United States. Agricultural Research Service…”
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4BookPublished 1962“…United States. Agricultural Research Service…”
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5Government Document Bookby Humpherys, Allan S.“…United States. Agricultural Research Service…”
Published 1977
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6BookPublished 1969“…United States. Agricultural Research Service…”
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7Conference Proceeding BookPublished 1975“…United States. Agricultural Research Service…”
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8Conference Proceeding BookPublished 1992“…United States. Agricultural Research Service…”
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9BookPublished 1962“…United States. Agricultural Research Service. Soil and Water Conservation Research Division…”
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10SerialPublished 1956“…United States. Agricultural Research Service…”
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11
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12BookPublished 1976“…United States. Agricultural Research Service…”
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13JournalPublished 1923“…United States. Agricultural Research Service…”
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14Government Document JournalPublished 1949“…United States. Agricultural Research Service…”
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15Government Document Serial