TY  - RPRT
TI  - Paleocene-Eocene boundary: Sedimentation in the Potomac River Valley, Virginia and Maryland: field trip guidebook
AU  - Thomas G. Gibson
AU  - Laurel M. Bybell
AU  - I. G. C. P. Project 308
PY  - 1991
UR  - https://pubs.usgs.gov/publication/70221644
ID  - 70221644
ER  -