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  1. 941
    Environment, a challenge to modern society /

    Environment, a challenge to modern society / by Caldwell, Lynton Keith

    Published 1971
    Book
  2. 942
    Ecology of North America /

    Ecology of North America / by Shelford, Victor E.

    Published 1963
    Book
  3. 943
    Yearbook of agriculture /

    Yearbook of agriculture /

    Published 1949
    Book
  4. 944
    Proccedings of the National Environmental Research Park Symposium /

    Proccedings of the National Environmental Research Park Symposium /

    Published 1975
    Conference Proceeding Book
  5. 945
    Final report of the Meeting of experts on consevation of the major terrestrial ecosystems of the Western hemisphere /

    Final report of the Meeting of experts on consevation of the major terrestrial ecosystems of the Western hemisphere /

    Published 1978
    Conference Proceeding Book
  6. 946
    Vegetation : identification of Typal Communities /

    Vegetation : identification of Typal Communities / by Daubenmire, Rexford

    Published 1966
    Book
  7. 947
    California serpentines : flora, vegetation, geology, soils, and management problems /

    California serpentines : flora, vegetation, geology, soils, and management problems / by Kruckeberg, Arthur R.

    Published 1984
    Book
  8. 948
    Desert Biome : Tucson validation sites report /

    Desert Biome : Tucson validation sites report /

    Published 1972
    Book
  9. 949
    Desert biome : analysis of ecosistems : Description of validation : sites word models.

    Desert biome : analysis of ecosistems : Description of validation : sites word models.

    Published 1972
    Conference Proceeding Book
  10. 950
    Rocky mountain forest and range experiment station /

    Rocky mountain forest and range experiment station /

    Published 1970
    Book
  11. 951
    Contaminación tóxica contribuye a crecimiento excesivo de algas

    Contaminación tóxica contribuye a crecimiento excesivo de algas

    Book
  12. 952
    Ecological impacts of snowpack augmentation in the San Juan mountains, Colorado /

    Ecological impacts of snowpack augmentation in the San Juan mountains, Colorado / by Steinhoff, Harold W.

    Published 1976
    Book
  13. 953
    High plains : problems of semiarid environments /

    High plains : problems of semiarid environments /

    Published 1972
    Book
  14. 954
    Balances of 137 Cs : Stable Cesium, and the Feeding rates of bluegill -Lepomis macrochirus raf : in white Oak Lake /

    Balances of 137 Cs : Stable Cesium, and the Feeding rates of bluegill -Lepomis macrochirus raf : in white Oak Lake / by Kolehmainen, S. E.

    Published 1969
    Book
  15. 955
    First world conference on national parks /

    First world conference on national parks /

    Published 1962
    Conference Proceeding Book
  16. 956
    Life of prairies and plains /

    Life of prairies and plains / by Allen, Durward L.

    Published 1967
    Book
  17. 957
    Manejo de nuestros recursos naturales /

    Manejo de nuestros recursos naturales / by Camp, William G.

    Published 2000
    Book
  18. 958
    Buenos Aires, Iowa, y el desarrollo agropecuario en las pampas y las praderas /

    Buenos Aires, Iowa, y el desarrollo agropecuario en las pampas y las praderas / by Azcuy Ameghino, Eduardo

    Published 1997
    Book
  19. 959
    Industrialización de productos agropecuarios : desarrollo en los Estados Unidos de Norteamérica, especialmente como fuente de materias primas para la industria química /

    Industrialización de productos agropecuarios : desarrollo en los Estados Unidos de Norteamérica, especialmente como fuente de materias primas para la industria química / by Cambiaggio, Héctor P.

    Published 1966
    Book
  20. 960
    Protected fishes of the United States and Canada /

    Protected fishes of the United States and Canada / by Johnson, James E.

    Published 1987
    Book

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