1975 BC National Science Week Woodley ST 006
1976 BC National Science Week Woodley NIS
1976 BC Prize-giving Mark Henning and Piet Koornhof NIS
19771220 Annexure A: Letter from National Education to the Transvaal Administrator
19780922 Mark Henning letter to Dr P G J Koornhof
197902 Mark Henning Draft letter to Minister of National Education
19790228 Mark Henning Memorandum to Council re Admission of Blacks to St Stithians