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1by Frenkel, Robert E.Subjects: “...Riparian ecology Oregon Willamette River Valley....”
Published 1983
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2by Price, Don, 1929-Subjects: “...Groundwater Oregon Willamette River Valley....”
Published 1967
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3by Wood, Tamara M.Subjects: “...Roadside improvement Oregon Willamette River Valley....”
Published 2001
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4by Conklin, Frank S.Subjects: “...Smoke Environmental aspects Oregon Willamette River Valley....”
Published 1979
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5by Morgan, David S.Subjects: “...Groundwater Oregon Willamette River Valley Bibliography....”
Published 1992
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6by Withrow-Robinson, Bradford A.Subjects: “...Poplar Oregon Willamette River Valley....”
Published 1995
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7Published 2017Subjects: “...Habitat conservation Oregon Willamette River Valley....”
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8Published 2017Subjects: “...Habitat conservation Oregon Willamette River Valley....”
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9Published 2004Subjects: “...Wetland management Oregon Willamette River Valley....”
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10by Prescott, Cynthia Culver, 1975-Subjects: “...Women pioneers Oregon Willamette River Valley History 19th century....”
Published 2007
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11Subjects: “...Streamflow Oregon Willamette River Valley Mathematical models....”
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12by Cross, Timothy L.Subjects: “...Grass seed industry Economic aspects Oregon Willamette River Valley....”
Published 1989
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13by Perry, Vivian (Journalist)Subjects: “...Vintners Oregon Willamette River Valley Biography....”
Published 2013
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14Published 1969Subjects: “...Water resources development Oregon Willamette River Valley....”
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15Published 2001Subjects: “...Geology Oregon Willamette River Valley....”
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16by Piper, Arthur M. (Arthur Maine), 1898-1989Subjects: “...Geology Oregon Willamette River Valley....”
Published 1942
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17by Hampton, E. R.Subjects: “...Geology Oregon Willamette River Valley....”
Published 1972
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18by Olsson, Lars Erik, 1933-Subjects: “...Air quality management Oregon Willamette River Valley Mathematical models....”
Published 1970
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19by Olsson, Lars Erik, 1933-Subjects: “...Air quality management Oregon Willamette River Valley Mathematical models....”
Published 1971
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20by Woodward, D. G.Subjects: “...Groundwater Oregon Willamette River Valley Region....”
Published 1998
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