TY  - RPRT
TI  - Relation of the lower Pennsylvanian unconformity to a mid-carboniferous eustatic event in the eastern United States
AU  - K. J. Englund
AU  - R. E. Thomas
PY  - 1997
UR  - https://pubs.usgs.gov/publication/70206433
ID  - 70206433
ER  -