Sponges in time and space : biology, chemistry, paleontology : proceedings of the 4th international Porifera congress, Amsterdam, The Netherlands, 19-23 April 1993 / ed. by Rob W.M. van Soest, Theo M.G. van Kempen, Jean-Claude Braekman ; assisted by Anita Brink & Frans R. Bianchi, Jan J. Vermeulen

Sponges in time and space : biology, chemistry, paleontology : proceedings of the 4th international Porifera congress, Amsterdam, The Netherlands, 19-23 April 1993 / ed. by Rob W.M. van Soest, Theo M.G. van Kempen, Jean-Claude Braekman ; assisted by Anita Brink & Frans R. Bianchi, Jan J. Vermeulen