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  1. 4201
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    The economics of soil conservation by Bunce, Arthur C

    Published 1945
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  2. 4202
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    Las condiciones del suelo y el desarrollo de las plantas by Russell, E. John, Russell, E. Walter

    Published 1954
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  3. 4203
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    Métodos fitotécnicos: procedimientos científicos para mejorar las plantas cultivadas by Hayes, Herbert Kendall

    Published 1951
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  4. 4204
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    The nature and properties of soils: a college text of edaphology by Lyon, Thomas Lyttleton, Buckman, Harry Oliver

    Published 1943
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  5. 4205
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    Resource conservation: economics and policies by Ciriacy-Wantrup, Siegfried von

    Published 1952
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  6. 4206
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    Water: the yearbook of agriculture 1955

    Published 1956
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  7. 4207
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    Guía para la descripción de perfiles de suelo

    Published 1960
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  8. 4208
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    Introducción a la teoría general de la administración by Chiavenato, Idalberto

    Published 1989
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  9. 4209
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    Air pollution and industry

    Published 1972
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  10. 4210
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    Business and administrative policy: text, cases, incidents and readings by Buskirk, Richard H

    Published 1971
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  11. 4211
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    El uso eficaz de los fertilizantes by Ignatieff, Vladimir, Page, Harold J

    Published 1959
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  12. 4212
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    Mecanización agrícola

    Published 1938
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  13. 4213
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    Autotrophic micro-organisms

    Published 1954
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  14. 4214
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    La fisiología de la madera frutal by Feucht, Walter

    Published 1967
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  15. 4215
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    Manual de fertilizantes para Chile by Letelier Almeyda, Elías

    Published 1967
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  16. 4216
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    Curso de conservación de la naturaleza y sus recursos renovables

    Published 1974
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  17. 4217
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    Irrigation principles and practices by Israelsen, Orson Winso

    Published 1945
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  18. 4218
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    Irrigated soils: their fertility and management by Thorne, D. W, Peterson, H. B

    Published 1949
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  19. 4219
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    Plant morphogenesis by Sinnott, Edmund Ware

    Published 1979
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  20. 4220
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    Humus: origin, chemical composition, and importance in nature by Waksman, Selman A

    Published 1938
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