Biological monitoring of national fresh waters: water system report Meuse 1996
Liefveld, W.M.; Van Looy, K.; Prins, K.H. (2002). Biological monitoring of national fresh waters: water system report Meuse 1996. RIZA/RIKZ-report, 2002.022. Institute for Inland Water Management and Waste Water Treatment (RIZA): Lelystad. ISBN 90-369-5444-4. 28 pp.