Geology and mineral resources of the Ramey and Houtzdale quadrangles, Clearfield and Centre counties, Pennsylvania /
Geology and mineral resources of the Hazen, Falls Creek, Reynoldsville, and Dubois quadrangles, Clearfield and Jefferson Counties, Pennsylvania /
Groundwater resources : investigation and development /
Groundwater in geologic processes /
Groundwater resources assessment : Jaroslav Balek
Groundwater. /
Barrier pillars in Lackawanna Basin northern field : anthracite region of Pennsylvania /
Geology and mineral resources of Estonia. /
Groundwater recovery /
Seepage and groundwater /
Groundwater hydraulics /
Groundwater quality. /
Groundwater engineering. /
The English counties /
Groundwater in the environment : an introduction /
Pärnu County. : Guidelines for investors, exporters and guests of Pärnu County.
Tajny anglijskoj razvedki (1939-1945) /
Northern lights romantic piano pieces /
Groundwater in civil engineering /
Geology and groundwater resources of northern Berks County, Pennsylvania /