00302nam a2200097Ia 4500008004100000082002800041245008300069260001000152300000900162650003300171130903s9999    xx            000 0 und d  a06.005:061.6:631(213)    aGroupment d etudes at de recherches pourle development de agronomie tropicale.  aParis  a47p.  aAgriculture-Research-Tropics