1996 Guyana
Authors: Brouwer, L.C.
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1996 General
Authors: Lammerts van Bueren, E.M. and J.F. Duivenvoorden
1996 Colombia
Authors: Suárez, A. and Galaeno, G.
Authors: Taale, T. and Griffiths, J.
Authors: Hout, P. van der
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