1. National evaluation report of the Joint Monitoring Programme of The Netherlands 1990;Akkerman;Rijkswaterstaat. Tidal Waters Division. Report. No. DGW-92.003,1992
2. The implementation of the Ministerial Declaration of the Second International Conference on the Protection of the North Sea,1990
3. 1990 Interim report on the quality status of the North Sea,1990
4. Organochlorines in benthic polychaetes (Nephtys spp.) and sediments from the southern North Sea. Identification of individual PCB components;Boon;Neth. J. Sea Res.,1985
5. Distribution of chlorinated organic compounds in livers of dab (Limanda limanda) of the southern and central North Sea;Büther;Mitt. Geol. Paläont. Inst. Univ. Hamburg,1988