Matèries dins de la cerca
Matèries dins de la cerca
Soils
161
Classification
76
Sols
49
Soil formation
26
Soil surveys
24
Soil science
18
Land use
17
més ...
1
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2
per Newhouse, Joseph Robert
[California, PA : California State College], 1980
[California, PA : California State College], 1980
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3
per Mattoon, Wilbur R. (Wilbur Reed), 1875-1941
Washington, D.C. : United States Department of Agriculture, 1936
Rev. Sept. 1936.
Washington, D.C. : United States Department of Agriculture, 1936
Rev. Sept. 1936.
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4
A revision of the species of Monopsyllus Kolenati in North America (Siphonaptera, ceratophyllidae) /
per Johnson, Phyllis Truth, 1926-
Washington : U.S. Dept. of Agriculture, 1961
Washington : U.S. Dept. of Agriculture, 1961
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5
per Phillips, W. J. (William Jeter), 1879-
Washington : U.S. Dept. of Agriculture, 1936
Washington : U.S. Dept. of Agriculture, 1936
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6
Blacksburg, VA : Pocahontas Press, 1999
8th ed.
8th ed.
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7
per Bullis, Harvey R. (Harvey Raymond), 1924-, Roe, Richard B., Gatlin, Judith C.
Washington, DC : United States Government Printing Office, 1972
Washington, DC : United States Government Printing Office, 1972
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8
9
per Dale, Arlene
Ogden, Utah : Intermountain Forest & Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1968
Ogden, Utah : Intermountain Forest & Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1968
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10
per Martin, S. Clark (Samuel Clark), 1916-
Washington : U.S. Dept. of Agriculture, 1974
Washington : U.S. Dept. of Agriculture, 1974
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11
per Newhouse, Joseph Robert
California, Pa. : [California State College], 1980
California, Pa. : [California State College], 1980
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12
per Higgins, Robert P.
Washington : Smithsonian Institution Press, 1986
Washington : Smithsonian Institution Press, 1986
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13
per Mathis, Wayne N.
City of Washington : Smithsonian Institution Press, 1985
City of Washington : Smithsonian Institution Press, 1985
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14
per Meñez, Ernani G.
Washington : Smithsonian Institution Press, 1982
Washington : Smithsonian Institution Press, 1982
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15
per Vari, Richard P.
City of Washington : Smithsonian Institution Press, 1984
City of Washington : Smithsonian Institution Press, 1984
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16
per Vari, Richard P.
Washington, D.C. : Smithsonian Institution Press, 1983
Washington, D.C. : Smithsonian Institution Press, 1983
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17
per Vari, Richard P.
Washington : Smithsonian Institution Press, 1986
Washington : Smithsonian Institution Press, 1986
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18
per Mathis, Wayne N.
Washington : Smithsonian Institution Press, 1986
Washington : Smithsonian Institution Press, 1986
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19
per Flint, Oliver S.
City of Washington : Smithsonian Institution Press, 1984
City of Washington : Smithsonian Institution Press, 1984
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20
per Kensley, Brian Frederick
City of Washington : Smithsonian Institution Press, 1983
City of Washington : Smithsonian Institution Press, 1983
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