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Hall Daniel, Bernal J D & Crowther J G. (1935). Frustration of science. : .
Hall Daniel, Bernal J D and Crowther J G. 1935. Frustration of science. : .
Hall Daniel, Bernal J D and Crowther J G. (1935). Frustration of science. : .
Hall Daniel, Bernal J D and Crowther J G. Frustration of science. : . 1935.