Thomas E WhiteleyThomas E. Whiteley has retired as Associate Director of Photographic Research at Eastman Kodak. Gerald J. Kloc is Geological Technician in the Department of Earth and Environmental Sciences at the University of Rochester. Carlton E. Brett is Professo of Geology at the University of Cincinnati and coauthor of Fossil Crinoids. Rolf Ludvigsen is Head of Denman Institute for Research on Trilobites, editor of The Trilobite Papers, and Adjunct Professor at the School of Earth and Ocean Sciences, University of Victoria. Read More Read Less