Soils and the greenhouse effect : the present status and future trends concerning the effect of soils and their cover on the fluxes of greenhouse gases, the surface energy balance and the water balance : proceedings of the International Conference Soils and the Greenhouse Effect, held 1989, in Wageningen (engelsk)
Bekämpfung des Treibhauseffektes aus ökonomischer Sicht : Ergebnisse des Ladenburger Kollegs "Umweltstaat" der Gottlieb- Daimler-und-Karl-Benz-Stiftung (tysk)