Union of South Africa, Department of Bantu Administration and Development, Ethnological Publications. Pretoria: Government Printer. No. 38. A Study of Okahandja District (South West Africa). By Günter Wagner (revised and edited by Oswin Köhler). 1957. Pp. 106, map. 4s. 6d. - Union of South Africa, Department of Bantu Administration and Development, Ethnological Publications. Pretoria: Government Printer. No. 40. A Study of Karibib District (South West Africa). By Oswin Köhler. 1958. Pp. 116, map. 4s. 3d. - Union of South Africa, Department of Bantu Administration and Development, Ethnological Publications. Pretoria: Government Printer. No. 42. A Study of Gobabis District (South West Africa). By Oswin Köhler. 1959. Pp. 108, map. 4s. 9d. - Union of South Africa, Department of Bantu Administration and Development, Ethnological Publications. Pretoria: Government Printer. No. 43. A Study of Omaruru District (South West Africa). By Oswin Köhler. 1959. Pp. 113, map. 4s. 9d. (Nos. 40, 42, and 43 partly based on material of Günter Wagner.)