http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Conodonts from El Paso Group (Lower Ordovician) of westernmost Texas and southern New Mexico
by John E. Repetski ; prepared in cooperation with the United States Geological Survey.
Memoir (New Mexico. Bureau of Mines and Mineral Resources) ; 40