TY  - RPRT
TI  - Stratigraphic nomenclature databases for the United States, its possessions and territories
AU  - M. E. MacLachlan
PY  - 1992
DO  - 10.3133/ds6rel1
UR  - https://pubs.usgs.gov/publication/ds6rel1
ID  - ds6rel1
ER  -