Nitrate control policy, agriculture and land use : proceedings of the fourth Professional Environmental Seminar held on Tuesday 11th October 1994 at the Møller Centre, Cambridge /
Professional Environmental Seminar(4th :1994 :Møller Centre, Cambridge)
North, John.
University of Cambridge.
Générale des eaux.
Cambridge Environmental Initiative.
Cambridge : White Horse Press,
1995.
On cover: University of Cambridge in association with Generale des Eaux Group. Cambridge Environmental Initiative.