New fossil polychaete from Essex, Illinois
By: Ida Thompson -- and Ralph G. Johnson --.
Contributors: Johnson, Ralph Gordon, 1927-1976, joint author.
Series: Fieldiana -- v. 33, no. 25; Field Museum of Natural History. Publication -- 1254; Publication (Field Museum of Natural History) -- 1254.
Publisher: Field Museum of Natural History
Published: 1977
Place of publication: Chicago
Subjects: Esconites zelus.; Paleontology -- Pennsylvanian.; Paleontology -- Illinois -- Essex.
Other titles: New fossil polychaete