Agricultural practice and water quality on farms benefiting from derogation : design and organisation of the monitoring network for 2006-2009 and annual reports from 2008 onwards / B. Fraters, T.C. van Leeuwen, J. Reijs, L.J.M. Boumans, H.F.M. Aarts, G.H.G. Daatselaar, G.J. Doornewaard, D.W. de Hoop, J.J. Schröder, G.L. Velthof, M.H. Zwart
RIVM report 680717002/2007