1994 Guyana
Authors: Steege, H. ter
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1993 Colombia
Authors: Instituto Geográfico Augustín Codazzi (Eds. Saldarriaga, J.G. and Hammen T. van der)
Authors: Duivenvoorden, J.F. and Lips, J.M.
1993 Guyana
1993 General
Authors: Touber, L., Randen, Y. van and Gijsen, N.
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