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Johns, Harold Elford
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Johns, Harold Elford
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Spremo, Boris
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Toronto Star (Firm)
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Cancer
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Toronto Star Photograph Archive
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Dr. Harold Johns, who developed the world's first Cobalt 60 high-energy radiation unit for cancer, steps down this week from the Ontario Cancer Instit(...)
6/27/1980
Revolution: Dr. Harold Johns demonstrates the high-energy radiation unit he developed. It took 60 minutes to treat patients with 200,000-volt machines(...)
6/27/1980
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