1999 General
Authors: Beer, J. de
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1999 Colombia
Authors: Duivenvoorden, J.F.
1999 Guyana
Authors: Steege, H. ter, Lilwah, R, Ek, R.C., Hout P. van der, Thomas, R., Essen, J. van and Jetten V.
1999 Côte d'Ivoire
Authors: Caspary, H-U.
Authors: Ek, R.C.
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