The Cambrian Fossils of Chengjiang, ChinaHou Xian-Guang, David J. Siveter, Derek J. Siveter, Richard J. Aldridge, Cong Pei-Yun, Sarah E. Gabbott, Ma Xiao-Ya, Mark A. Purnell, Mark Williams · First published 2003Open the Tome
Conodonts of the Lower Border Group and Equivalent Strata (Life Sciences Con)Mark A. Purnell · First published 1992 · Latest edition 1993Open the Tome
