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  1. 1
    Published 1981
    Erevan : Izd-vo AN Arm︠i︡anakoĭ SSR, 1981.
    181 p. : ill. ; 23 cm.
  2. 2
    by Gan, Yinbo, 1964-
    Published 1999
    Netherlands : Rijksuniversiteit te Groningen, 1999.
    vi, 114 p. : ill. ; 25 cm.
  3. 3
    Published 1967
    Moskva : Izd-vo "Nauka", 1967.
    366 p. : ill. ; 27 cm.
  4. 4
    by Boissonnas, Charles
    Published 1926
    Genève, Jent s.a., 1926.
    24 p. incl. diagrs., tables. 8vo.
  5. 5
    by Pijnenborg, Jan, 1958-
    Published 1990
    [Wageningen, The Netherlands? : Landbouwuniversiteit te Wageningen?, 1990?]
    112 p. : ill. ; 24 cm.
  6. 6
    by Lindberg, Torbjörn
    Published 1985
    Uppsala : Swedish University of Agricultural Sciences, Department of Microbiology, 1985.
    1 v. (various pagings) : ill. ; 24 cm.
  7. 7
    by Jensen, Erik Steen
    Published 1997
    Roskilde, Denmark : Risø National Laboratory, [1997]
    1 v. (various pagings) : ill. ; 24 cm.
  8. 8
    Published 1981
    Novosibirsk : Izd-vo "Nauka," Sibirskoe otd-nie, 1981.
    191 p. : ill. ; 22 cm.
  9. 9
    by Rytter, Lars
    Published 1990
    Uppsala : Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research, 1990.
    1 v. (various pagings) : ill. ; 24 cm.
  10. 10
    Published 1982
    Bombay : Bhabha Atomic Research Centre, 1982.
    xii, 676 p. : ill. ; 25 cm.
  11. 11
    [Wageningen? : Landbouwuniversiteit te Wageningen?, 1992?]
    125 p. : ill. ; 24 cm.
  12. 12
    Moskva : "Nauka", 1994.
    167, [1] p. : ill. ; 22 cm.
  13. 13
    by Pettersson, Roger
    Published 1987
    Uppsala : Swedish University of Agricultural Sciences, Dept. of Ecology and Environmental Research, 1987.
    1 v. (various pagings) : ill. ; 24 cm.
  14. 14
    by Brotonegoro, Soetarjo
    Published 1974
    Wageningen, Veenman and Zonen, 1974.
    76 p. illus.
  15. 15
    by Cordewener, Jan
    Published 1987
    Wageningen : Landbouwuniversiteit te Wageningen, 1987.
    97 p. : ill. ; 14 cm.
  16. 16
    by Lindblad, Peter
    Published 1987
    Uppsala : Stockholm, Sweden : Uppsala University ; Distributor, Almqvist & Wiksell International, 1987.
    37 p. : ill. ; 21 cm.
  17. 17
    by Nyberg, Lena
    Published 1988
    Uppsala, Sweden : Dept. of Clinical Chemistry, Swedish University of Agricultural Sciences, 1988.
    1 v. (various pagings) : ill. ; 24 cm.
  18. 18
    by Högberg, Peter
    Published 1986
    Umeå, Sweden : Swedish University of Agricultural Sciences, Dept. of Forest Site Research, 1986.
    1 v. (various pagings) : ill., maps ; 25 cm.
  19. 19
    Moskva : Izd-vo "Nauka," 1968.
    530, [2] p. : ill. ; 22 cm.
  20. 20
    Published 1978
    [Bangladesh] : Organising Committee, National Seminar on Nitrogen in Crop Production, [1978?]
    3, 2, 171, ii p., [1] leaf of plates : ill. ; 25 cm.

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