M. A. C. Hinton, K. P. Oakley, H. G. Dines, W. B. R. King, A. S. Kennard, C. F. C. Hawkes, S. H. Warren, M. A. Cotton, W. E. L. G. Clark, and G. M. Morant. Report on the Swanscombe Skull. The Journal of the Royal Anthropological Institute of Great Britain and Ireland, JSTOR, volume 68, pages 17, January 1938.