Book reviews: Hoekstra,P. 1989: Netherlands Geographical Studies 87,River outflow,depositional proces ses and coastal morphodynamics in a monsoon- dominated deltaic environment,East Java,Indonesia. Amsterdam and Utrecht: Geogra fisch Instituut Rijksuniversiteit Utrecht. 224 pp

Hoekstra, P. 1989: Buoyant river plumes and mud deposition in a rapidly extending tropical delta. Netherlands Journal of Sea Research 23, 517-27.

Hoekstra, P. , Nolting, R.F. and van der Sloot, H.A. 1989: Supply and dispersion of water and suspended matter of the rivers Solo and Brabtas into the coastal waters of East Java, Indonesia. Netherlands Journal of Sea Research 23, 501-15.

Wright, L.D. 1985: River deltas. In Davis, R.A. , editor, Coastal sedimentary environments, New York: Springer-Verlag, 1-76.

Van der Sloot, H.A. , Hoede, D. and Wijkstra, J. 1989: Trace oxyanions and their behaviour in the rivers Porong and Solo, the Java Sea and the adjacent Indian Ocean. Netherlands Journal of Sea Research 23, 379-86.