Title: Arthropods, echinoderms, graptolites, annelids, and trace fossils
First published: 1974
Subjects: Fossil Invertebrates, Invertebrates, Fossil, Paleontology, Trace fossils
Places: Illinois, Missouri, Perry County
Time periods: Devonian
LC classification: HC107.I3 S64 no. 14, QE770 S64 no. 14