Further Reading
- Greenstock, Clive L. A New Kind of Ray: The Radiological Sciences in Canada 1895-1995. eds. J.A. Aldrich and B.C. Lentle, The Canadian Association of Radiologists, Montreal 1995.
- Johns, Harold E. and Cunningham, John R. The Physics of Radiology, 4th Edition, Charles C Thomas, Springfield 1983.
- Johns, H.E., Bates L.M., Epp E.R., et al. 1,000-curie cobalt 60 units for radiation therapy. Nature. 168(4285):1035-6, 1951.
Read more about this topic: Harold E. Johns
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