@book{9d3471f969e441f5b9f15b02cb637961,
title = "A geohydrologic study of East Gelderland : Netherlands",
keywords = "watervoerende lagen, grondwater, hydrologie, nederland, gelderland, geohydrologie, achterhoek, aquifers, groundwater, hydrology, netherlands, gelderland, geohydrology, achterhoek",
author = "L.F. Ernst and {de Ridder}, N.A. and {de Vries}, J.J.",
note = "Overdr.: Geologie en mijnbouw, 49(1970)6,457-488",
year = "1970",
language = "English",
series = "Verspreide overdrukken. Instituut voor cultuurtechniek en waterhuishouding",
number = "no. 115",
}