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  1. 61
    by Sewell, Owen Keith
    Published 1946
    Subjects
    Connect to electronic version
    Thesis Book
  2. 62
    by Fry, Bernard Alfred
    Published 1955
    Subjects ...Nitrogen-fixing microorganisms....
    Book
  3. 63
  4. 64
  5. 65
    by Chapman, Margaret W.
    Published 1956
    Subjects ...Nitrogen Isotopes Bibliography....
    Book
  6. 66
    Published 1958
    Subjects ...Nitrogen....
    Book
  7. 67
    Subjects ...Steel Nitrogen content....
    Book
  8. 68
    Published 2007
    Subjects ...Nitrogen cycle....
    Connect to electronic resource
    eBook
  9. 69
    Published 1978
    Subjects ...Soils Nitrogen content Congresses....
    Book
  10. 70
    Published 1978
    Subjects ...Nitrogen Fixation Congresses....
    Book
  11. 71
    by Tamm, Carl Olof
    Published 1991
    Subjects ...Nitrogen cycle....
    Book
  12. 72
    Published 1978
    Subjects ...Nitrogen-fixing microorganisms Congresses....
    Book
  13. 73
    Published 1989
    Subjects
    Book
  14. 74
    Published 1978
    Subjects
    Book
  15. 75
    by Moldovan, Iuliu
    Published 1969
    Subjects
    Book
  16. 76
    Published 1988
    Subjects ...Steel Nitrogen content Congresses....
    Conference Proceeding Book
  17. 77
    by Bray, C. M., 1945-
    Published 1983
    Subjects ...Nitrogen Metabolism....
    Book
  18. 78
    by Blokker, P. C.
    Published 1975
    Subjects
    Book
  19. 79
    by Beevers, Leonard
    Published 1976
    Subjects ...Nitrogen Metabolism....
    Book
  20. 80
    by McNaughton, Allan John
    Published 1967
    Subjects
    Thesis Book