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2. Authority Health and Safety Branch, United Kingdom Atomic Energy Authority: Handbook of Criticality Data, Vol. I, AHSB(S) Handbook 1, 1967; Handbook of Experimental Criticality Data, AHSB(S) Handbook 5, Part I, Chaps. 1 to 4, (1967); Part II, Chaps. 5 and 6 (1968);