D. C. S. Oosthuizen

D. C. S. Oosthuizen could refer to a person, but without additional context, it's unclear who specifically this refers to. Oosthuizen is a surname that is of Dutch origin and is found in various countries, particularly in South Africa. If you are referring to a specific individual, such as an author, researcher, or professional, please provide more context so I can assist you accurately. If you mean a specific work or topic associated with someone named D. C. S.