CramerW2025-03-112025-03-111987https://rivm.openrepository.com/handle/10029/630661Groundwater hydrology.ArticleIn: Kundzewicz AW, Gottschalk L, Webb B, eds. Hydrology 2000. Wallingford: IAHS Press, 1987;17-25 (IAHS Publication no 171)2025-03-11