http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Pennsylvanian conodont biostratigraphy and paleoecology of northwestern Illinois
2 sheets (v, 130 pages, 4 unnumbered leaves of plates) : illustrations, maps ; 14.8 x 10.5 cm.