H. N. Visser

• Die geologie van die gebied om Volksrust
• The geology and mineral resources of the Saldanha Bay area
• The geology of the country north of Nelspruit
• The geology of the country south of Ermelo
• The geology of the Koedoesrand area, northern Transvaal
• The geology of the Newcastle and Dundee areas and a detailed description of the Klip River coalfield of Northern Natal
• Verslag oor boorgate 1/57 tot 15/58 in die steenkoolveld Soutpansberg