1989 General
Authors: Touber, L., Smaling, E.M.A., Andriesse, W. and Hakkeling, R.T.A
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1989 Colombia
Authors: Jonkers, W.B.J. and Glastra, R.
1988 Guyana
Authors: Mennega, E.A., Tammens de Rooij, W.C.M. and Jansen-Jacobs, M.J. (eds.)
1988 General
Authors: Reitsma, J.M.
1987 General
Authors: Beusekom, C.F. van, Goor, C.P. van and Schmidt, P.
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