Ingrid Dennis / Gerrit Johannes Van Tonder / Kornelius Riemann / South Africa. Water Research Commission / University of the Free State. Institute for Groundwater Studies

1868459241 / 9781868459247

Aquifers

Jürgen Kirchner / Gerrit Johannes Van Tonder / Eelco Lukas / University of the Orange Free State. Institute for Ground-Water Studies / South Africa. Water Research Commission

1874858071 / 9781874858072

Aquifers

G. Steyl / Gerrit Johannes Van Tonder / Luc P. Chevallier / South Africa. Water Research Commission

1431202258 / 9781431202256

Drinking water

M. Du Preez / R. Dennis / Gerrit Johannes Van Tonder / South Africa. Water Research Commission

1770055428 / 9781770055421

Aquifers

Jürgen Otto Gustav Kirchner / Gerrit Johannes Van Tonder / Eelco Lukas

187485808X / 9781874858089

Aquifers

Gerrit Johannes Van Tonder / Frank Day Ian Hodgson

OCLC:813485740

Gerrit Johannes Van Tonder

OCLC:123577743

Geochemistry

Gerrit Johannes Van Tonder / Frank Day Ian Hodgson / University of the Orange Free State. Institute for Ground-Water Studies

OCLC:819413564

Jeanette Buys / Gerrit Johannes Van Tonder / J. F. Botha / South Africa. Water Research Commission / University of the Orange Free State. Institute for Ground-Water Studies

1868451690 / 9781868451692

Aquifers

P. D. Vermeulen / B. H. Usher / Gerrit Johannes Van Tonder

1770056904 / 9781770056909

Groundwater

Johannes Phillipus Maree / Paulette Millard / Gerrit Johannes Van Tonder / South Africa. Water Research Commission / South African Council for Scientific and Industrial Research. Division of Water, Environment, and Forestry Technology

1868452417 / 9781868452415

Limestone

R. G. Ellington / B. H. Usher / Gerrit Johannes Van Tonder / South Africa. Water Research Commission

1770052151 / 9781770052154

Groundwater

P. M. J. Verwey / P. D. Vermeulen / Gerrit Johannes Van Tonder / South Africa. Water Research Commission

1431200573 / 9781431200573

Groundwater

Gerrit Johannes Van Tonder

OCLC:638537512

Water, Ondergronds