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  1. 1
    by Rocha, Helio Olympio da
    Published 1981
    Freiburg im Breisgau : Institut für Bodenkunde und Waldernährungslehre der Albert-Ludwigs-Universität Freiburg i. Br., 1981.
    iv, 189 p. : ill. ; 21 cm.
  2. 2
    by Meijer, H. (Hendrik), 1912-
    Published 1951
    Wageningen, H. Veenman [1951]
    208 p. maps, diagrs. 24 cm.
  3. 3
    by Bazlen, Katja, 1968-
    Published 2000
    Ostfildern : Selbstverlag Katja Bazlen, 2000.
    136 p. : ill. ; 21 cm.
  4. 4
    by Schöningh, Elmar
    Published 1985
    Giessen : Tropeninstitut Giessen, 1985.
    189 p. : ill., map ; 23 cm.
  5. 5
    by Sombroek, Wim G.
    Published 1966
    Wageningen, Centre for Agricultural Publications and Documentation, 1966.
    303 p. with illus. 7 fold. profiles (part col.) tables. 25 cm.

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