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by Johns, K.
Published in ITNOW (2011)
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3
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4
5
by Johns, K A
Published in BMJ (1978)
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8
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11
by Landsberg, P.T, Johns, K.A
Published in Annals of Physics (1970)
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12
13
by LANDSBERG, P. T., JOHNS, K. A.
Published in Nature (1968)
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