1. Radiographic type p pneumoconiosis: high-resolution CT.
2. (1971): The relationship between the amount of dust breathed and the development of radiological signs of silicosis: an epidemiological study of South African gold miners. In (ed): Inhaled Particles III. Oxford: Pergamon Press, pp 953–964.
3. CT assessment of silicosis in exposed workers
4. ILO (1980): “Guidelines for the Use of ILO International Classification of Radiographs of Pneumoconioses.” ILO, Geneva: OSH Series No. 22, Revised 1980.