The ecological bases for lake and reservoir management : proceedings of the ecological bases for management of lakes and reservoirs symposium, held 10-22 March 1996, Leicester, United Kingdom / ed. by David M. Harper ... [et al.]Lake Naivasha, Kenya : papers submitted by participants at the conference "Science and the sustainable management of shallow tropical waters" held at Kenya Wildlife Services Training Institute, Naivasha, Kenya, 11-16 April 1999, together with those from additional studies on the lake / ed. by D.M. Harper ... [et al.]Rutland water - decade of change : proceedings of the conference held in Leicester, U.K., 1-3 April 1981 / ed. by David M. Harper and John A. Bullock