http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Check list of fossil invertebrates described from the Middle Devonian silica formation of northwestern Ohio and southeastern Michigan
by Erwin C. Stumn [as printed] and Ruth B. Chilman.
Contributions from the Museum of Paleontology ; v. 21, no. 7