Chapter

Romano, M., Chang, W.T., Dean, W.T., Edgecombe, G.D., Fortey, R.A., Holloway, D.J., Lane, P.D., Owen, A.W., Owens, R.M., Palmer, A.R., Rushton, A.W.A., Shergold, J.H., Siveter, D.J. & Whyte, M.A. 1993. Arthropoda (Trilobita). In M.J. Benton (ed.), The Fossil Record 2. Chapman & Hall, London: [279]-296.