Stratigraphic Nomenclature Databases For The United States, Its Possessions, and Territories
USGS, 1996. U.S. geological survey digital data series DDS-6 Release 3. CD Rom in jewel case. This CD-Rom is the initial phase of a computerized lexicon of geologic or stratigraphic unit names (GNULEX) used in the United States, its possessions, and territories. CD. More