Ecophysiological strategies of drought tolerant phototrophic micro-organisms in dune soils / Gerhardus Bernardus Maria de WinderDe waterhuishouding van Nederland in de droge perioden van 1976 / [samengest. door Rijkswaterstaat]African armyworm outbreaks: why do they occur after drought? / J.A.M. JanssenThe river became their field : coping strategies in a semi-arid area in Zimbabwe / Marleen Dekker & Anne Hoppenbrouwers