Dico Fraters

Nitrogen monitoring in groundwater in the sandy regions of the Netherlands

G. Drecht, L. Boumans, D. Fraters, 1998 .

Nitrate leaching in agriculture to upper groundwater in the sandy regions of the Netherlands during the 1992–1995 period

G. Drecht, L. Boumans, D. Fraters, 2005, Environmental monitoring and assessment.