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684
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1
Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1962
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Government Document
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2
由 Lesh, F. R.
Bureau of Chemistry and Soils, 1933
Bureau of Chemistry and Soils, 1933
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3
[Washington] : U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering, 1950
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Government Document
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4
5
6
由 Graham, Ian, 1953-
Chicago, Ill. : Heinemann Library, 2005
Chicago, Ill. : Heinemann Library, 2005
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8
9
10
Grafton, WI : Blue Sky Associates, 1996
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未知
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12
13
Washington : U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils and Agricultural Engineering, 1951
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14
15
由 Moran, W. J.
Bureau of Chemistry and Soils, 1933
Bureau of Chemistry and Soils, 1933
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图书
16
由 Kubiëna, Walter Ludwig, 1897-
Ames, Ia., Collegiate Press 1938
Ames, Ia., Collegiate Press 1938
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18
由 Jury, William A., 1946-
Basel ; Boston : Birkhäuser Verlag, 1990
Basel ; Boston : Birkhäuser Verlag, 1990
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20
[Managua, Nicaragua] : Editorial Enlace, 1990
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