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  1. 1
    by Horst, Hans, 1889-
    Published 1915
    Merseburg, Druck von F. Stollberg, 1915.
    2 p. l., 136 p., 1 l. 25 cm.
  2. 2
    by Jürging, Hans-Rudolf
    Published 1975
    [Düsseldorf] : Landesausschuss für Landwirtschaftliche Forschung, Erziehung und Wirtschaftsberatung beim Ministerium für Ernährung, Landwirtschaft und Forsten des Landes Nordrhein-Westfalen, 1975.
    198 p. : graphs, maps ; 21 cm.
  3. 3
    by Siebert, Josef Bernhard, 1876-
    Published 1910
    Bonn, Georgi, 1910.
    251 p. illus. 23 cm.
  4. 4
    by Frentz, Therese
    Published 1991
    [Bonn : s.n.], 1991.
    li, 333 p. : ill., maps ; 21 cm.
  5. 5
    by Born, Dietrich
    Published 1969
    Hannover, A. Strothe, 1969.
    278 p. illus., 21 cm.
  6. 6
    by Rothe, Fritz, b. 1888
    Published 1912
    M. Gladbach : Hausdruckerei des Volksvereins-Verlags, 1912.
    68 p. ; 22 cm.
  7. 7
    by Reinmold, Karl, 1930-
    Published 1966
    Bonn, 1966.
    vii, 182 p. 21 cm.
  8. 8
  9. 9
    by Fischer, Paul, 1909-
    Published 1936
    Dusseldorf, G.H. Nolte, 1936.
    iv, 70 p., 1 l. 21 cm.
  10. 10
    by Menzenbach, Josef, 1912-
    Published 1940
    Düsseldorf, G.H. Nolte, 1940.
    v, 65, [4] p. table. 21 cm.
  11. 11
    by Mantau, Reinhard
    Published 1974
    Stuttgart 1974.
    143 p.
  12. 12
  13. 13
    by Offergeld, Dieter, 1936-
    Published 1965
    [Düsseldorf, Druck: R. Stehle] 1965.
    x, 166 p. 21 cm.
  14. 14
  15. 15
    by Meyer, Berta, 1891-
    Published 1918
    Berlin, J. Springer, 1918.
    33, [3] p. 24 cm.
  16. 16
    by Kleinertz, Everhard, 1939-
    Published 1972
    Bonn, 1972.
    254 p. 21 cm.
  17. 17
    by Zinke, Thomas
    Published 1976
    Münster-Hiltrup : Landesausschuss für landwirtschaftliche Forschung, Erziehung und Wirtschaftsberatung beim Ministerium für Ernährung, Landwirtschaft und Forsten des Landes Nordrhein-Westfalen, 1976.
    190 p. : ill. ; 21 cm.
  18. 18
    by Becker, Anton
    Published 1913
    München, Leipzig, Duncker & Humblot, 1913.
    viii, 83 p. 23 cm.
  19. 19
    by Closhen, Barbara
    Published 1972
    Bonn, Rheinischen Friedrich-Wilhelms-Universität, 1972.
  20. 20
    by Mallinckrodt, Max, b. 1883
    Published 1911
    Tübingen : H. Laupp, 1911.
    xv, 104 p. ; 23 cm.

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