Van der Westhuizen, W. A.De Bruiyn, H.Meintjes, Petrus Gerhardus2015-11-232015-11-231988-10http://hdl.handle.net/11660/1735Abstract not availableenThesis (Ph.D. (Geology))--University of the Orange Free State, 1998Petrology -- South AfricaGeology, Stratigraphic -- South AfricaStratigraphy, petrochemistry and genesis of the Makwassie formation, Ventersburg supergroupThesisUniversity of the Free State