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1
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2Published 1991“…United States…”
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3
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4
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5Published 1953“…United States Department of Agriculture…”
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6Published 1952“…Department of agriculture United States…”
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7Published 1974“…United States Department of Agriculture…”
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8Published 1978“…United States Census Bureau…”
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9
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10Published 1997“…United States Golf Association…”
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11Published 1978“…United States Department of Agriculture…”
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12Published 1954“…United States Salinity Laboratory Staff…”
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13Published 1931“…United States of America Department of Commerce…”
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14
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15Published 1949“…United States of America Department of Commerce…”
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16by Greville, T. N. E. (Thomas Nall Eden), 1910-1998“…United States. Public Health Service…”
Published 1947
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17Published 1971“…United States. Human Communication Program…”
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18
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19“…United States. National Technical Information Service…”
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20