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by Clegg, Stewart R.; Courpasson, David; Phillips, Nelson X.
by David Clegg; Shirley Billington
by Holman, David; Wall, Toby D.; Clegg, Chris W.; et al.
by Clegg, William; Blake, Alexander J; Cole, Jacqueline M; et al.
by David J. Weatherall (FRS); J. B. Clegg