TY - RPRT TI - Borehole sampling of surficial sediments in Northern Virginia and Southern Maryland AU - Peter G. Chirico AU - Jessica D. DeWitt AU - Sarah E. Bergstresser PY - 2021 DO - 10.3133/ofr20211038 UR - https://pubs.usgs.gov/publication/ofr20211038 ID - ofr20211038 ER -