Departement Publieke WerkenPublieke Werke Dept.Wierda, Sytze Wopkes, 1839-19112014-08-262014-08-261899-04-042014-08-26http://hdl.handle.net/2263/41661Digitised version of National Archive file S.3/1692. Drawings of the office and laboratory for the explosives inspector, including the "Voorgevel, Eindgevel, Doorsnede" (Front Gable, End Gable, Section), signed by "S.W. Wierda, Hoofd van Publ. Werken"PlanPDF, JPEGNational Archives; Digital rights: University of PretoriaOffice buildingLaboratoryJohannesburgPlan or blueprint