P. Vrbka

An overview of the geology and hydrogeology of Nigeria

P. Vrbka, P. Vrbka, 2008 .

Hydraulic characteristics of the Maastrichtian sedimentary rocks of the southeastern Bida Basin, central Nigeria

O. J. Ojo, P. Vrbka, H. Gebhardt, 1999 .

Groundwater in north and central sudan

O. Abdalla, R. Bussert, P. Vrbka, 2008 .