URL: Cambrian Geology and Paleontology, No. 2 - Cambrian TrilobitesAuthor Names: Walcott, Charles D.Era/Period/Epoch: CambrianCitation Note:: Part of Vol. LIII, No. 2Document type: FullPublication Type: BookPublication Volume Number: 53Publication Issue Number: 1805Page Numbers:: 1-165Year/month of publication: 1908-04