(1987). Upper Cretaceous and Dinantian geology and hydrogeology of the Thermae boreholes of Valkenburg aan de Geul (South-Limburg, the Netherlands).
Chicago-Zitierstil (17. Ausg.)Upper Cretaceous and Dinantian Geology and Hydrogeology of the Thermae Boreholes of Valkenburg Aan De Geul (South-Limburg, the Netherlands). Liège, 1987.
MLA-Zitierstil (9. Ausg.)Upper Cretaceous and Dinantian Geology and Hydrogeology of the Thermae Boreholes of Valkenburg Aan De Geul (South-Limburg, the Netherlands). 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.